Faster access than browser!
116 relations: Absorption (chemistry), Adherens junction, Animal, Basement membrane, Blastula, Blood, Blood vessel, Body cavity, Brush border, Carcinoma, Cell junction, Cell nucleus, Central canal, Chitin, Cilium, Circulatory system, Connective tissue, Connexin, Cornea, Count noun, Cuticle, Cystic fibrosis, Cytokeratin, Dark cell, Desmosome, Ectoderm, Endocrine gland, Endocrine system, Endoderm, Endothelium, Epidermis, Epithelial polarity, Epithelial–mesenchymal transition, Epithelium, Exocrine gland, Extracellular matrix, Eye, Fallopian tube, Gap junction, Gastrointestinal tract, Gastrulation, Germ layer, Germinal epithelium (female), Germinal epithelium (male), Gland, Glomerulus, Glycocalyx, Goblet cell, Hair cell, Heart, ..., Hemidesmosome, Human skin, Inclusion bodies, Injury, Inner ear, Integument, Keratin, Lip, List of pathologists, Lumen (anatomy), Lung, Lymphatic system, Mammary gland, Mass noun, Mechanosensation, Mesoderm, Mesothelium, Microvillus, Molecular diffusion, Morphology (biology), Motility, Mucociliary clearance, Muscle tissue, Nerve, Nervous tissue, Neuroepithelial cell, Oral mucosa, Organ (anatomy), Ovary, Paracellular transport, Pericardium, Peritoneum, Pharynx, Pleural cavity, Pseudostratified columnar epithelium, Pulmonary alveolus, Pyknosis, Radiation, Respiratory epithelium, Respiratory tract, Salivary gland, Sarcoma, Secretion, Sense, Sex organ, Simple columnar epithelium, Simple cuboidal epithelium, Simple squamous epithelium, Skin, Skin cancer, Spinal cord, Stereocilia (inner ear), Stratified columnar epithelium, Stratified cuboidal epithelium, Stratified squamous epithelium, Sulcular epithelium, Sweat gland, Taste bud, Thermoception, Tight junction, Tissue (biology), Toxin, Transcellular transport, Transitional epithelium, Triploblasty, Urothelium. Expand index (66 more) »
Absorption (chemistry)
In chemistry, absorption is a physical or chemical phenomenon or a process in which atoms, molecules or ions enter some bulk phase – liquid or solid material.
New!!: Epithelium and Absorption (chemistry) · See more »
Adherens junction
Adherens junctions (or zonula adherens, intermediate junction, or "belt desmosome") are protein complexes that occur at cell–cell junctions in epithelial and endothelial tissues, usually more basal than tight junctions.
New!!: Epithelium and Adherens junction · See more »
Animal
Animals are multicellular eukaryotic organisms that form the biological kingdom Animalia.
New!!: Epithelium and Animal · See more »
Basement membrane
The basement membrane is a thin, fibrous, extracellular matrix of tissue that separates the lining of an internal or external body surface from underlying connective tissue in metazoans.
New!!: Epithelium and Basement membrane · See more »
Blastula
The blastula (from Greek βλαστός (blastos), meaning "sprout") is a hollow sphere of cells, referred to as blastomeres, surrounding an inner fluid-filled cavity called the blastocoele formed during an early stage of embryonic development in animals.
New!!: Epithelium and Blastula · See more »
Blood
Blood is a body fluid in humans and other animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells.
New!!: Epithelium and Blood · See more »
Blood vessel
The blood vessels are the part of the circulatory system, and microcirculation, that transports blood throughout the human body.
New!!: Epithelium and Blood vessel · See more »
Body cavity
A body cavity is any fluid-filled space in a multicellular organism other than those of vessels (such as blood vessels and lymph vessels).
New!!: Epithelium and Body cavity · See more »
Brush border
A brush border (striated border or brush border membrane) is the microvilli-covered surface of simple cuboidal epithelium and simple columnar epithelium cells found in certain locations of the body.
New!!: Epithelium and Brush border · See more »
Carcinoma
Carcinoma is a type of cancer that develops from epithelial cells.
New!!: Epithelium and Carcinoma · See more »
Cell junction
A cell junction (or intercellular bridge) is a type of structure that exists within the tissue of some multicellular organisms, such as animals.
New!!: Epithelium and Cell junction · See more »
Cell nucleus
In cell biology, the nucleus (pl. nuclei; from Latin nucleus or nuculeus, meaning kernel or seed) is a membrane-enclosed organelle found in eukaryotic cells.
New!!: Epithelium and Cell nucleus · See more »
Central canal
The central canal, also known as ependymal canal, is the cerebrospinal fluid-filled space that runs longitudinally through the length of the entire spinal cord.
New!!: Epithelium and Central canal · See more »
Chitin
Chitin (C8H13O5N)n, a long-chain polymer of ''N''-acetylglucosamine, is a derivative of glucose.
New!!: Epithelium and Chitin · See more »
Cilium
A cilium (the plural is cilia) is an organelle found in eukaryotic cells.
New!!: Epithelium and Cilium · See more »
Circulatory system
The circulatory system, also called the cardiovascular system or the vascular system, is an organ system that permits blood to circulate and transport nutrients (such as amino acids and electrolytes), oxygen, carbon dioxide, hormones, and blood cells to and from the cells in the body to provide nourishment and help in fighting diseases, stabilize temperature and pH, and maintain homeostasis.
New!!: Epithelium and Circulatory system · See more »
Connective tissue
Connective tissue (CT) is one of the four basic types of animal tissue, along with epithelial tissue, muscle tissue, and nervous tissue.
New!!: Epithelium and Connective tissue · See more »
Connexin
Connexins (Cx), or gap junction proteins, are structurally related transmembrane proteins that assemble to form vertebrate gap junctions.
New!!: Epithelium and Connexin · See more »
Cornea
The cornea is the transparent front part of the eye that covers the iris, pupil, and anterior chamber.
New!!: Epithelium and Cornea · See more »
Count noun
In linguistics, a count noun (also countable noun) is a noun that can be modified by a numeral and that occurs in both singular and plural forms, and that co-occurs with quantificational determiners like every, each, several, etc.
New!!: Epithelium and Count noun · See more »
Cuticle
A cuticle, or cuticula, is any of a variety of tough but flexible, non-mineral outer coverings of an organism, or parts of an organism, that provide protection.
New!!: Epithelium and Cuticle · See more »
Cystic fibrosis
Cystic fibrosis (CF) is a genetic disorder that affects mostly the lungs, but also the pancreas, liver, kidneys, and intestine.
New!!: Epithelium and Cystic fibrosis · See more »
Cytokeratin
Cytokeratins are keratin proteins found in the intracytoplasmic cytoskeleton of epithelial tissue.
New!!: Epithelium and Cytokeratin · See more »
Dark cell
Dark cells are specialized nonsensory epithelial cells found on either side of the vestibular organs, and lining the endolymphatic space.
New!!: Epithelium and Dark cell · See more »
Desmosome
A desmosome ("binding body"), also known as a macula adhaerens (plural: maculae adhaerentes) (Latin for adhering spot), is a cell structure specialized for cell-to-cell adhesion.
New!!: Epithelium and Desmosome · See more »
Ectoderm
Ectoderm is one of the three primary germ layers in the very early embryo.
New!!: Epithelium and Ectoderm · See more »
Endocrine gland
Endocrine glands are glands of the endocrine system that secrete their products, hormones, directly into the blood rather than through a duct.
New!!: Epithelium and Endocrine gland · See more »
Endocrine system
The endocrine system is a chemical messenger system consisting of hormones, the group of glands of an organism that carry those hormones directly into the circulatory system to be carried towards distant target organs, and the feedback loops of homeostasis that the hormones drive.
New!!: Epithelium and Endocrine system · See more »
Endoderm
Endoderm is one of the three primary germ layers in the very early embryo.
New!!: Epithelium and Endoderm · See more »
Endothelium
Endothelium refers to cells that line the interior surface of blood vessels and lymphatic vessels, forming an interface between circulating blood or lymph in the lumen and the rest of the vessel wall.
New!!: Epithelium and Endothelium · See more »
Epidermis
The epidermis is the outer layer of the three layers that make up the skin, the inner layers being the dermis and hypodermis.
New!!: Epithelium and Epidermis · See more »
Epithelial polarity
Cell polarity is a fundamental feature of many types of cells.
New!!: Epithelium and Epithelial polarity · See more »
Epithelial–mesenchymal transition
The epithelial–mesenchymal transition (EMT) is a process by which epithelial cells lose their cell polarity and cell-cell adhesion, and gain migratory and invasive properties to become mesenchymal stem cells; these are multipotent stromal cells that can differentiate into a variety of cell types.
New!!: Epithelium and Epithelial–mesenchymal transition · See more »
Epithelium
Epithelium is one of the four basic types of animal tissue, along with connective tissue, muscle tissue and nervous tissue.
New!!: Epithelium and Epithelium · See more »
Exocrine gland
Exocrine glands are glands that produce and secrete substances onto an epithelial surface by way of a duct.
New!!: Epithelium and Exocrine gland · See more »
Extracellular matrix
In biology, the extracellular matrix (ECM) is a collection of extracellular molecules secreted by support cells that provides structural and biochemical support to the surrounding cells.
New!!: Epithelium and Extracellular matrix · See more »
Eye
Eyes are organs of the visual system.
New!!: Epithelium and Eye · See more »
Fallopian tube
The Fallopian tubes, also known as uterine tubes or salpinges (singular salpinx), are two very fine tubes lined with ciliated epithelia, leading from the ovaries of female mammals into the uterus, via the uterotubal junction.
New!!: Epithelium and Fallopian tube · See more »
Gap junction
A gap junction may also be called a nexus or macula communicans.
New!!: Epithelium and Gap junction · See more »
Gastrointestinal tract
The gastrointestinal tract (digestive tract, digestional tract, GI tract, GIT, gut, or alimentary canal) is an organ system within humans and other animals which takes in food, digests it to extract and absorb energy and nutrients, and expels the remaining waste as feces.
New!!: Epithelium and Gastrointestinal tract · See more »
Gastrulation
Gastrulation is a phase early in the embryonic development of most animals, during which the single-layered blastula is reorganized into a multilayered structure known as the gastrula.
New!!: Epithelium and Gastrulation · See more »
Germ layer
A germ layer is a primary layer of cells that form during embryogenesis.
New!!: Epithelium and Germ layer · See more »
Germinal epithelium (female)
The ovarian surface epithelium, also called the germinal epithelium of Waldeyer, is a layer of simple squamous-to-cuboidal epithelial cells covering the ovary.
New!!: Epithelium and Germinal epithelium (female) · See more »
Germinal epithelium (male)
The germinal epithelium is the innermost layer of the testicle.
New!!: Epithelium and Germinal epithelium (male) · See more »
Gland
A gland is a group of cells in an animal's body that synthesizes substances (such as hormones) for release into the bloodstream (endocrine gland) or into cavities inside the body or its outer surface (exocrine gland).
New!!: Epithelium and Gland · See more »
Glomerulus
Glomerulus is a common term used in anatomy to describe globular structures of entwined vessels, fibers, or neurons.
New!!: Epithelium and Glomerulus · See more »
Glycocalyx
The glycocalyx, also known as the pericellular matrix, is a glycoprotein and glycolipid covering that surrounds the cell membranes of some bacteria, epithelia, and other cells.
New!!: Epithelium and Glycocalyx · See more »
Goblet cell
Goblet cells are simple columnar epithelial cells that secrete gel-forming mucins, like mucin MUC5AC.
New!!: Epithelium and Goblet cell · See more »
Hair cell
Hair cells are the sensory receptors of both the auditory system and the vestibular system in the ears of all vertebrates.
New!!: Epithelium and Hair cell · See more »
Heart
The heart is a muscular organ in most animals, which pumps blood through the blood vessels of the circulatory system.
New!!: Epithelium and Heart · See more »
Hemidesmosome
Hemidesmosomes (HD) are very small stud-like structures found in keratinocytes of the epidermis of skin that attach to the extracellular matrix (ECM).
New!!: Epithelium and Hemidesmosome · See more »
Human skin
The human skin is the outer covering of the body.
New!!: Epithelium and Human skin · See more »
Inclusion bodies
Inclusion bodies, sometimes called elementary bodies, are nuclear or cytoplasmic aggregates of stable substances, usually proteins.
New!!: Epithelium and Inclusion bodies · See more »
Injury
Injury, also known as physical trauma, is damage to the body caused by external force.
New!!: Epithelium and Injury · See more »
Inner ear
The inner ear (internal ear, auris interna) is the innermost part of the vertebrate ear.
New!!: Epithelium and Inner ear · See more »
Integument
In biology, integument is the natural covering of an organism or an organ, such as its skin, husk, shell, or rind.
New!!: Epithelium and Integument · See more »
Keratin
Keratin is one of a family of fibrous structural proteins.
New!!: Epithelium and Keratin · See more »
Lip
Lips are a visible body part at the mouth of humans and many animals.
New!!: Epithelium and Lip · See more »
List of pathologists
A list of people notable in the field of pathology.
New!!: Epithelium and List of pathologists · See more »
Lumen (anatomy)
In biology, a lumen (plural lumina) is the inside space of a tubular structure, such as an artery or intestine.
New!!: Epithelium and Lumen (anatomy) · See more »
Lung
The lungs are the primary organs of the respiratory system in humans and many other animals including a few fish and some snails.
New!!: Epithelium and Lung · See more »
Lymphatic system
The lymphatic system is part of the vascular system and an important part of the immune system, comprising a network of lymphatic vessels that carry a clear fluid called lymph (from Latin, lympha meaning "water") directionally towards the heart.
New!!: Epithelium and Lymphatic system · See more »
Mammary gland
A mammary gland is an exocrine gland in mammals that produces milk to feed young offspring.
New!!: Epithelium and Mammary gland · See more »
Mass noun
In linguistics, a mass noun, uncountable noun, or non-count noun is a noun with the syntactic property that any quantity of it is treated as an undifferentiated unit, rather than as something with discrete subsets.
New!!: Epithelium and Mass noun · See more »
Mechanosensation
Mechanosensation is a response mechanism to mechanical stimuli.
New!!: Epithelium and Mechanosensation · See more »
Mesoderm
In all bilaterian animals, the mesoderm is one of the three primary germ layers in the very early embryo.
New!!: Epithelium and Mesoderm · See more »
Mesothelium
The mesothelium is a membrane composed of simple squamous epithelium that forms the lining of several body cavities: the pleura (thoracic cavity), peritoneum (abdominal cavity including the mesentery), mediastinum and pericardium (heart sac).
New!!: Epithelium and Mesothelium · See more »
Microvillus
Microvilli (singular: microvillus) are microscopic cellular membrane protrusions that increase the surface area for diffusion and minimize any increase in volume, and are involved in a wide variety of functions, including absorption, secretion, cellular adhesion, and mechanotransduction.
New!!: Epithelium and Microvillus · See more »
Molecular diffusion
Molecular diffusion, often simply called diffusion, is the thermal motion of all (liquid or gas) particles at temperatures above absolute zero.
New!!: Epithelium and Molecular diffusion · See more »
Morphology (biology)
Morphology is a branch of biology dealing with the study of the form and structure of organisms and their specific structural features.
New!!: Epithelium and Morphology (biology) · See more »
Motility
Motility is the ability of an organism to move independently, using metabolic energy.
New!!: Epithelium and Motility · See more »
Mucociliary clearance
Mucociliary clearance, also referred to as mucociliary apparatus or mucociliar clearance (MCC), derived from mucus, cilia (cilia of the tracheal surface epithelium in the respiratory tract) and clearance describes the self-clearing mechanism of the bronchi.
New!!: Epithelium and Mucociliary clearance · See more »
Muscle tissue
Muscle tissue is a soft tissue that composes muscles in animal bodies, and gives rise to muscles' ability to contract.
New!!: Epithelium and Muscle tissue · See more »
Nerve
A nerve is an enclosed, cable-like bundle of axons (nerve fibers, the long and slender projections of neurons) in the peripheral nervous system.
New!!: Epithelium and Nerve · See more »
Nervous tissue
Nervous tissue or nerve tissue is the main tissue component of the two parts of the nervous system; the brain and spinal cord of the central nervous system (CNS), and the branching peripheral nerves of the peripheral nervous system (PNS), which regulates and controls bodily functions and activity.
New!!: Epithelium and Nervous tissue · See more »
Neuroepithelial cell
Neuroepithelial cells are the "stem cells" of the nervous system, deriving from actual stem cells in several different stages of neural development.
New!!: Epithelium and Neuroepithelial cell · See more »
Oral mucosa
The oral mucosa is the mucous membrane lining the inside of the mouth and consists of stratified squamous epithelium termed oral epithelium and an underlying connective tissue termed lamina propria.
New!!: Epithelium and Oral mucosa · See more »
Organ (anatomy)
Organs are collections of tissues with similar functions.
New!!: Epithelium and Organ (anatomy) · See more »
Ovary
The ovary is an organ found in the female reproductive system that produces an ovum.
New!!: Epithelium and Ovary · See more »
Paracellular transport
Paracellular transport refers to the transfer of substances across an epithelium by passing through the intercellular space between the cells.
New!!: Epithelium and Paracellular transport · See more »
Pericardium
The pericardium is a double-walled sac containing the heart and the roots of the great vessels.
New!!: Epithelium and Pericardium · See more »
Peritoneum
The peritoneum is the serous membrane that forms the lining of the abdominal cavity or coelom in amniotes and some invertebrates, such as annelids.
New!!: Epithelium and Peritoneum · See more »
Pharynx
The pharynx (plural: pharynges) is the part of the throat that is behind the mouth and nasal cavity and above the esophagus and the larynx, or the tubes going down to the stomach and the lungs.
New!!: Epithelium and Pharynx · See more »
Pleural cavity
The pleural cavity is the thin fluid-filled space between the two pulmonary pleurae (known as visceral and parietal) of each lung.
New!!: Epithelium and Pleural cavity · See more »
Pseudostratified columnar epithelium
A pseudostratified epithelium is a type of epithelium that, though comprising only a single layer of cells, has its cell nuclei positioned in a manner suggestive of stratified epithelia.
New!!: Epithelium and Pseudostratified columnar epithelium · See more »
Pulmonary alveolus
A pulmonary alveolus (plural: alveoli, from Latin alveolus, "little cavity") is a hollow cavity found in the lung parenchyma, and is the basic unit of ventilation.
New!!: Epithelium and Pulmonary alveolus · See more »
Pyknosis
Pyknosis, or karyopyknosis, is the irreversible condensation of chromatin in the nucleus of a cell undergoing necrosis or apoptosis.
New!!: Epithelium and Pyknosis · See more »
Radiation
In physics, radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium.
New!!: Epithelium and Radiation · See more »
Respiratory epithelium
Respiratory epithelium is a type of ciliated epithelium found lining most of the respiratory tract, where it serves to moisten and protect the airways.
New!!: Epithelium and Respiratory epithelium · See more »
Respiratory tract
In humans, the respiratory tract is the part of the anatomy of the respiratory system involved with the process of respiration.
New!!: Epithelium and Respiratory tract · See more »
Salivary gland
The salivary glands in mammals are exocrine glands that produce saliva through a system of ducts.
New!!: Epithelium and Salivary gland · See more »
Sarcoma
A sarcoma is a cancer that arises from transformed cells of mesenchymal origin.
New!!: Epithelium and Sarcoma · See more »
Secretion
Secretion is the movement of material from one point to another, e.g. secreted chemical substance from a cell or gland.
New!!: Epithelium and Secretion · See more »
Sense
A sense is a physiological capacity of organisms that provides data for perception.
New!!: Epithelium and Sense · See more »
Sex organ
A sex organ (or reproductive organ) is any part of an animal's body that is involved in sexual reproduction.
New!!: Epithelium and Sex organ · See more »
Simple columnar epithelium
A simple columnar epithelium is a columnar epithelium that is uni-layered.
New!!: Epithelium and Simple columnar epithelium · See more »
Simple cuboidal epithelium
Simple cuboidal epithelium is a type of epithelium that consists of a single layer of cuboidal (cube-like) cells.
New!!: Epithelium and Simple cuboidal epithelium · See more »
Simple squamous epithelium
A simple squamous epithelium is a single layer of flat cells in contact with the basal lamina (one of the two layers of the basement membrane) of the epithelium.
New!!: Epithelium and Simple squamous epithelium · See more »
Skin
Skin is the soft outer tissue covering vertebrates.
New!!: Epithelium and Skin · See more »
Skin cancer
Skin cancers are cancers that arise from the skin.
New!!: Epithelium and Skin cancer · See more »
Spinal cord
The spinal cord is a long, thin, tubular bundle of nervous tissue and support cells that extends from the medulla oblongata in the brainstem to the lumbar region of the vertebral column.
New!!: Epithelium and Spinal cord · See more »
Stereocilia (inner ear)
In the inner ear, stereocilia are the mechanosensing organelles of hair cells, which respond to fluid motion in numerous types of animals for various functions, including hearing and balance.
New!!: Epithelium and Stereocilia (inner ear) · See more »
Stratified columnar epithelium
Stratified columnar epithelium is a rare type of epithelial tissue composed of column shaped cells arranged in multiple layers.
New!!: Epithelium and Stratified columnar epithelium · See more »
Stratified cuboidal epithelium
Stratified cuboidal epithelium is a type of epithelial tissue composed of multiple layers of cube-shaped cells.
New!!: Epithelium and Stratified cuboidal epithelium · See more »
Stratified squamous epithelium
A stratified squamous epithelium consists of squamous (flattened) epithelial cells arranged in layers upon a basal membrane.
New!!: Epithelium and Stratified squamous epithelium · See more »
Sulcular epithelium
The sulcular epithelium is that epithelium which lines the gingival sulcus.
New!!: Epithelium and Sulcular epithelium · See more »
Sweat gland
Sweat glands, also known as sudoriferous or sudoriparous glands,, are small tubular structures of the skin that produce sweat.
New!!: Epithelium and Sweat gland · See more »
Taste bud
Taste buds contain the taste receptor cells, which are also known as gustatory cells.
New!!: Epithelium and Taste bud · See more »
Thermoception
Thermoception or thermoreception is the sense by which an organism perceives temperature, or more accurately, temperature differences inferred from heat flux.
New!!: Epithelium and Thermoception · See more »
Tight junction
Tight junctions, also known as occluding junctions or zonulae occludentes (singular, zonula occludens) are multiprotein junctional complex whose general function is to prevent leakage of transported solutes and water and seals the paracellular pathway.
New!!: Epithelium and Tight junction · See more »
Tissue (biology)
In biology, tissue is a cellular organizational level between cells and a complete organ.
New!!: Epithelium and Tissue (biology) · See more »
Toxin
A toxin (from toxikon) is a poisonous substance produced within living cells or organisms; synthetic toxicants created by artificial processes are thus excluded.
New!!: Epithelium and Toxin · See more »
Transcellular transport
Transcellular transport involves the transportation of solutes by a cell through a cell.
New!!: Epithelium and Transcellular transport · See more »
Transitional epithelium
Transitional epithelium is a type of stratified epithelium – tissue consisting of multiple layers of epithelial cells which can contract and expand as needed.
New!!: Epithelium and Transitional epithelium · See more »
Triploblasty
Triploblasty is a condition of the blastula in which there are three primary germ layers: the ectoderm, mesoderm, and endoderm.
New!!: Epithelium and Triploblasty · See more »
Urothelium
Urothelium (or uroepithelium) is an example of transitional epithelium.
New!!: Epithelium and Urothelium · See more »
Redirects here:
Columnar, Columnar cell, Columnar cells, Columnar ciliated epithelium, Columnar epithelia, Columnar epithelial cell, Columnar epithelium, Complex epithelial, Cornified epithelial cell, Cornified epithelium, Cubical cells, Cuboidal, Cuboidal cell, Cuboidal cells, Cuboidal epithelia, Cuboidal epithelial cell, Cuboidal epithelium, Epithelia, Epithelial, Epithelial Simple ciliated, Epithelial cell, Epithelial cells, Epithelial layer, Epithelial lining, Epithelial tissue, Epithelian, Eptihelial, Gastric epithelial cell, Gastric epithelium, Glandular epithelia, Glandular epithelium, High-columnar, Keratinized epithelium, Keratinized stratified epithelium, Keratinizing stratified epithelia, Membranous tissue, Non-cornified, Non-cornified epithelium, Non-keratinized epithelium, Simple epithelium, Simple squamous epithelia, Squam Epithel, Squamous, Squamous cell, Squamous cells, Squamous epithelia, Squamous epithelial cell, Squamous epithelial cells, Squamous epithelium, Squamous skin cell, Table of simple epithelia type, Table of simple epithelia types, Table of simple epithelium type, Table of simple epithelium types, Transitional cell.
References
[1] https://en.wikipedia.org/wiki/Epithelium
