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) » « Shrink index
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.
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.
Animals are multicellular eukaryotic organisms that form the biological kingdom Animalia.
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.
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.
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.
The blood vessels are the part of the circulatory system, and microcirculation, that transports blood throughout the human body.
A body cavity is any fluid-filled space in a multicellular organism other than those of vessels (such as blood vessels and lymph vessels).
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.
Carcinoma is a type of cancer that develops from epithelial cells.
A cell junction (or intercellular bridge) is a type of structure that exists within the tissue of some multicellular organisms, such as animals.
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.
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.
Chitin (C8H13O5N)n, a long-chain polymer of ''N''-acetylglucosamine, is a derivative of glucose.
A cilium (the plural is cilia) is an organelle found in eukaryotic cells.
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.
Connective tissue (CT) is one of the four basic types of animal tissue, along with epithelial tissue, muscle tissue, and nervous tissue.
Connexins (Cx), or gap junction proteins, are structurally related transmembrane proteins that assemble to form vertebrate gap junctions.
The cornea is the transparent front part of the eye that covers the iris, pupil, and anterior chamber.
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.
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.
Cystic fibrosis (CF) is a genetic disorder that affects mostly the lungs, but also the pancreas, liver, kidneys, and intestine.
Cytokeratins are keratin proteins found in the intracytoplasmic cytoskeleton of epithelial tissue.
Dark cells are specialized nonsensory epithelial cells found on either side of the vestibular organs, and lining the endolymphatic space.
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.
Ectoderm is one of the three primary germ layers in the very early embryo.
Endocrine glands are glands of the endocrine system that secrete their products, hormones, directly into the blood rather than through a duct.
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.
Endoderm is one of the three primary germ layers in the very early embryo.
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.
The epidermis is the outer layer of the three layers that make up the skin, the inner layers being the dermis and hypodermis.
Cell polarity is a fundamental feature of many types of cells.
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.
Epithelium is one of the four basic types of animal tissue, along with connective tissue, muscle tissue and nervous tissue.
Exocrine glands are glands that produce and secrete substances onto an epithelial surface by way of a duct.
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.
Eyes are organs of the visual system.
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.
A gap junction may also be called a nexus or macula communicans.
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.
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.
A germ layer is a primary layer of cells that form during embryogenesis.
The ovarian surface epithelium, also called the germinal epithelium of Waldeyer, is a layer of simple squamous-to-cuboidal epithelial cells covering the ovary.
The germinal epithelium is the innermost layer of the testicle.
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).
Glomerulus is a common term used in anatomy to describe globular structures of entwined vessels, fibers, or neurons.
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.
Goblet cells are simple columnar epithelial cells that secrete gel-forming mucins, like mucin MUC5AC.
Hair cells are the sensory receptors of both the auditory system and the vestibular system in the ears of all vertebrates.
The heart is a muscular organ in most animals, which pumps blood through the blood vessels of the circulatory system.
Hemidesmosomes (HD) are very small stud-like structures found in keratinocytes of the epidermis of skin that attach to the extracellular matrix (ECM).
The human skin is the outer covering of the body.
Inclusion bodies, sometimes called elementary bodies, are nuclear or cytoplasmic aggregates of stable substances, usually proteins.
Injury, also known as physical trauma, is damage to the body caused by external force.
The inner ear (internal ear, auris interna) is the innermost part of the vertebrate ear.
In biology, integument is the natural covering of an organism or an organ, such as its skin, husk, shell, or rind.
Keratin is one of a family of fibrous structural proteins.
Lips are a visible body part at the mouth of humans and many animals.
A list of people notable in the field of pathology.
In biology, a lumen (plural lumina) is the inside space of a tubular structure, such as an artery or intestine.
The lungs are the primary organs of the respiratory system in humans and many other animals including a few fish and some snails.
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.
A mammary gland is an exocrine gland in mammals that produces milk to feed young offspring.
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.
Mechanosensation is a response mechanism to mechanical stimuli.
In all bilaterian animals, the mesoderm is one of the three primary germ layers in the very early embryo.
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).
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.
Molecular diffusion, often simply called diffusion, is the thermal motion of all (liquid or gas) particles at temperatures above absolute zero.
Morphology is a branch of biology dealing with the study of the form and structure of organisms and their specific structural features.
Motility is the ability of an organism to move independently, using metabolic energy.
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.
Muscle tissue is a soft tissue that composes muscles in animal bodies, and gives rise to muscles' ability to contract.
A nerve is an enclosed, cable-like bundle of axons (nerve fibers, the long and slender projections of neurons) in the peripheral nervous system.
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.
Neuroepithelial cells are the "stem cells" of the nervous system, deriving from actual stem cells in several different stages of neural development.
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.
Organs are collections of tissues with similar functions.
The ovary is an organ found in the female reproductive system that produces an ovum.
Paracellular transport refers to the transfer of substances across an epithelium by passing through the intercellular space between the cells.
The pericardium is a double-walled sac containing the heart and the roots of the great vessels.
The peritoneum is the serous membrane that forms the lining of the abdominal cavity or coelom in amniotes and some invertebrates, such as annelids.
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.
The pleural cavity is the thin fluid-filled space between the two pulmonary pleurae (known as visceral and parietal) of each lung.
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.
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.
Pyknosis, or karyopyknosis, is the irreversible condensation of chromatin in the nucleus of a cell undergoing necrosis or apoptosis.
In physics, radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium.
Respiratory epithelium is a type of ciliated epithelium found lining most of the respiratory tract, where it serves to moisten and protect the airways.
In humans, the respiratory tract is the part of the anatomy of the respiratory system involved with the process of respiration.
The salivary glands in mammals are exocrine glands that produce saliva through a system of ducts.
A sarcoma is a cancer that arises from transformed cells of mesenchymal origin.
Secretion is the movement of material from one point to another, e.g. secreted chemical substance from a cell or gland.
A sense is a physiological capacity of organisms that provides data for perception.
A sex organ (or reproductive organ) is any part of an animal's body that is involved in sexual reproduction.
A simple columnar epithelium is a columnar epithelium that is uni-layered.
Simple cuboidal epithelium is a type of epithelium that consists of a single layer of cuboidal (cube-like) cells.
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.
Skin is the soft outer tissue covering vertebrates.
Skin cancers are cancers that arise from the skin.
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.
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.
Stratified columnar epithelium is a rare type of epithelial tissue composed of column shaped cells arranged in multiple layers.
Stratified cuboidal epithelium is a type of epithelial tissue composed of multiple layers of cube-shaped cells.
A stratified squamous epithelium consists of squamous (flattened) epithelial cells arranged in layers upon a basal membrane.
The sulcular epithelium is that epithelium which lines the gingival sulcus.
Sweat glands, also known as sudoriferous or sudoriparous glands,, are small tubular structures of the skin that produce sweat.
Taste buds contain the taste receptor cells, which are also known as gustatory cells.
Thermoception or thermoreception is the sense by which an organism perceives temperature, or more accurately, temperature differences inferred from heat flux.
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.
In biology, tissue is a cellular organizational level between cells and a complete organ.
A toxin (from toxikon) is a poisonous substance produced within living cells or organisms; synthetic toxicants created by artificial processes are thus excluded.
Transcellular transport involves the transportation of solutes by a cell through a cell.
Transitional epithelium is a type of stratified epithelium – tissue consisting of multiple layers of epithelial cells which can contract and expand as needed.
Triploblasty is a condition of the blastula in which there are three primary germ layers: the ectoderm, mesoderm, and endoderm.
Urothelium (or uroepithelium) is an example of transitional epithelium.
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