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17 relations: Bilateria, Blastoderm, Blastula, Choanoderm, Cnidaria, Diploblast, Diploblasty, Ectoderm, Embryo, Endoderm, Flatworm, Gastrulation, Germ layer, Mesoderm, Mesohyl, Pinacoderm, Sponge.
Bilateria
The Bilateria or bilaterians, or triploblasts, are animals with bilateral symmetry, i.e., they have a head (anterior) and a tail (posterior) as well as a back (dorsal) and a belly (ventral); therefore they also have a left side and a right side.
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Blastoderm
A blastoderm (germinal disc, blastodisc) is a single layer of embryonic epithelial tissue that makes up the blastula.
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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.
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Choanoderm
The choanoderm is a type of cell layer composed of flagellated collar cells, or choanocytes found in sponges.
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Cnidaria
Cnidaria is a phylum containing over 10,000 species of animals found exclusively in aquatic (freshwater and marine) environments: they are predominantly marine species.
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Diploblast
The diploblasts, or Eumetazoa, or Epitheliozoa, or Histozoa are a proposed basal animal clade as sister of the sponges.
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Diploblasty
Diploblasty is a condition of the blastula in which there are two primary germ layers: the ectoderm and endoderm.
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Ectoderm
Ectoderm is one of the three primary germ layers in the very early embryo.
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Embryo
An embryo is an early stage of development of a multicellular diploid eukaryotic organism.
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Endoderm
Endoderm is one of the three primary germ layers in the very early embryo.
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Flatworm
The flatworms, flat worms, Platyhelminthes, Plathelminthes, or platyhelminths (from the Greek πλατύ, platy, meaning "flat" and ἕλμινς (root: ἑλμινθ-), helminth-, meaning "worm") are a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrates.
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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.
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Germ layer
A germ layer is a primary layer of cells that form during embryogenesis.
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Mesoderm
In all bilaterian animals, the mesoderm is one of the three primary germ layers in the very early embryo.
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Mesohyl
The mesohyl, formerly known as mesenchyme or as mesoglea, is the gelatinous matrix within a sponge.
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Pinacoderm
The pinacoderm is the outer most layer of cells (pinacocytes) surrounding the body of organisms belonging to the phylum Porifera (sponges), equivalent to the epidermis in other organisms.
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Sponge
Sponges, the members of the phylum Porifera (meaning "pore bearer"), are a basal Metazoa clade as sister of the Diploblasts.
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