Embryonic Development (Weeks 3-8) definitions Flashcards

Transformation of the bilaminar embryonic disc into a trilaminar disc with three germ layers.

Inner germ layer forming the epithelial lining of the digestive, respiratory, and urogenital systems.

Middle germ layer forming structures like the notochord, somites, and cardiovascular system.

Outer germ layer developing into the nervous system, sense organs, and epidermis.

A groove on the embryonic disc facilitating the formation of the three germ layers.

Process where germ layers differentiate into organs and systems, recognizable by week 8.

Structure formed by mesodermal cells, organizing the embryo along a central axis.

Paired structures from mesoderm developing into the skeleton, dermis, and skeletal muscle.

First major event of ectoderm specialization forming the nervous system.

Thickened ectoderm portion that folds to form the neural tube.

Structure formed from the neural plate, developing into the central nervous system.

Cells forming between ectoderm and neural tube, creating peripheral nervous system structures.

Structure attached to the endoderm, evolving throughout development.

Structure developing into a portion of the urinary bladder.

Outer skin layer formed by the ectoderm, covering the body.