Endoderm

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Endoderm
Endoderm2.png
Organs derived from endoderm.
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Blastodermic vesicle of Vespertilio murinus. (Endoderm labeled as 'entoderm'.)
Gray's subject #6 49
MeSH Endoderm

Endoderm is one of the germ layers formed during animal embryogenesis. Cells migrating inward along the archenteron form the inner layer of the gastrula, which develops into the endoderm.

The endoderm consists at first of flattened cells, which subsequently become columnar. It forms the epithelial lining of the whole of the digestive tube except part of the mouth,pharynx and the terminal part of the rectum (which are lined by involutions of the ectoderm), the lining cells of all the glands which open into the digestive tube, including those of the liver and pancreas, the epithelium of the auditory tube and tympanic cavity, of the trachea, bronchi, and air cells of the lungs, of the urinary bladder and part of the urethra, and that which lines the follicles of the thyroid gland and thymus.

Production

The following graph represents the products produced by the endoderm.

Germ Layer Category Product
Endoderm General[1] Gastrointestinal tract
Endoderm General Respiratory tract
Endoderm General Endocrine glands and organs (liver and pancreas)

Additional images

See also

Notes

  1. The General category denotes that all or most of the animals containing this layer produce the adjacent product.

References

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  • Evers, Christine A., Lisa Starr. Biology:Concepts and Applications. 6th ed. United States:Thomson, 2006. ISBN 0-534-46224-3.

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.ar:أديم باطن da:Endoderm de:Entodermeo:Endodermoit:Endoderma nl:Endodermsr:Ендодерм fi:Endodermi sv:Endodermuk:Ентодерма


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