Developmental anatomy

Developmental anatomy

The study of the development of fertalized egg to adult.

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Developmental anatomy

Primitive streak

Anatomy; Developmental anatomy

A faint white trace at the caudal end of the embryonic disc, formed by the movement of cells at the beginning of the mesoderm formation. It provides the earliest indication of the embryonic axis.

Primitive node

Anatomy; Developmental anatomy

A mass of cells at the cranial end of the primitive streak, related to the organisation of the embryo.

Polar body

Anatomy; Developmental anatomy

The small abortive cells with a haploid chromosome complement, consisting of a tiny piece of cytoplasm and a nucleus, resulting from an unequal division of the primary oocyte.

Hyoid bar

Anatomy; Developmental anatomy

A pair of cartilaginous plates forming the second visceral arch, from which a part of the hyoid bone is developed.

Inner cell mass

Anatomy; Developmental anatomy

Group of centrally located blastomeres, thin outer layers of cells.

Lumbar

Anatomy; Developmental anatomy

Pertaining to the loins, the part of the back between the groyne and the pelvis.

Mandibular bar

Anatomy; Developmental anatomy

First of the five pharyngeal arches and is interposed between the mouth and the first ectodermal (visceral or pharyngeal) groove. The major portion, or mandibular process, of this arch forms the ...