Zoological terms

Zoological terms

Terms in relation to animals, such as mammals, birds, reptiles or fish.

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Zoological terms

amixia

Zoology; Zoological terms

A restriction that prevents general intercrossing in a species leading to inbreeding

aulotomy

Zoology; Zoological terms

Capacity of separating a limb; followed by regeneration; used also for asexual reproduction; see also fissipary (in echinodermata and platyhelminthes).

basal lamina

Zoology; Zoological terms

Basal plate of developing neural tube; the noncellular, collagenous layer that separates an epithelium from an underlying layer of tissue; also basal membrane.

blastula

Zoology; Zoological terms

Stage of embryonic development, at / near the end of cleavage, preceding gastrulation; generally consisting of a hollow ball of cells ( coeloblastula ); if no blastoceol is present it is termed ...

blastoporus

Zoology; Zoological terms

The opening into the archenteron (the primitive gastric cavity of the gastrula = gastrocoel) developed by the invagination of the blastula = protostoma

cephalisation

Zoology; Zoological terms

(Gk. kephale, little head) A type of animal body plan or organization in which one end contains a nerve-rich region and functions as a head

The zygote undergoes a series of rapid, synchronous mitotic divisions; results in a ball of many cells. Pattern of cleavage is based on the amount of yolk. Eggs with a small yolk divide completely ...