Ectoderm

The ectoderm (from gr. Εκτος [ ektos ] "outside" and to derma "skin") is the upper or first germ layer of the embryoblast . It is the outer layer of cells after gastrulation . The primitive ectoderm produces the embryonic mesoderm ( primitive streak ) through the process of neurulation (the beginning of the development of the nervous system ).

From the ectodermal cotyledon form:

• Skin (cutis) and skin glands formed from it , hair , claws , the epithelial lining of the foregut and rectum , the epithelium of the epiphysis and the pituitary gland
• Nervous system and adrenal medulla
• Sensory organs including the sensory organs of the epidermis , the cornea and lens of the eye
• Teeth specifically the enamel

See also

• Epidermoid cyst
• Endoderm
• Mesoderm

literature

• Gertrud Scherf: Dictionary Biologie dtv, Munich 1997 ISBN 3-423-32500-3

Individual evidence

1. ^ Neil A. Campbell , Jane B. Reece : Biology. Spektrum-Verlag 2003, ISBN 3-8274-1352-4 , page 1208