Developmental anatomy

Developmental anatomy

The study of the development of fertalized egg to adult.

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Developmental anatomy

Exocoelomic membrane

Anatomy; Developmental anatomy

A delicate sac of mesoblastic tissue that develops as a lining of the blastocyst or chorionic cavity just after implantation, forms the exocoelomic cavity and quickly disappears.

Germ disc

Anatomy; Developmental anatomy

A flattish area in a cleaved ovum in which the first traces of the embryo are seen.

Hensons node

Anatomy; Developmental anatomy

A primative knot; a mass of cells at the cranial end of the primative streak, related to the organisation of the embryo. It is the functional equivalent of the dorsal lip of the amphibian blastopore.

Amniotic cavity

Anatomy; Developmental anatomy

The fluid filled space within the cavity that is surrounded by amnion. A layer of extraembryonic ectoderm which encloses the embryo with a fluid filled cavity.

Ampulla of the uterine tube

Anatomy; Developmental anatomy

The thin-walled, almost muscle-free, midregion of the uterine tube; its mucosa is greatly plicated.

Trophoblast

Anatomy; Developmental anatomy

A granular protoplasmic body; a plastid, formed from cytotrophoblast, eventually surrounds the entire embryo; insert themselves between uterine epithelial cells, then spread along the epithilial ...

The yolk sac in man contains no nutrients so in this aspect is vestigial. However, the its embryonic endodermal roof is the source of the mucous membrane of almost the entire intestinal tract. The ...