endoderm

American  

[en-duh-durm] / ˈɛn dəˌdɜrm /

noun

1. Also called endoblast.  Embryology. the innermost cell layer of the embryo in its gastrula stage.

2. Anatomy. the innermost body tissue that derives from this layer, as the gut lining.

---

endoderm British  

/ ˈɛndəʊˌdɜːm /

noun

1. the inner germ layer of an animal embryo, which gives rise to the lining of the digestive and respiratory tracts See also ectoderm mesoderm

---

endoderm Scientific  

/ ĕn′də-dûrm′ /

1. The innermost of the primary germ layers of an animal embryo. In vertebrates, the endoderm gives rise to the respiratory tract, gastrointestinal tract (except mouth and anus), glands associated with the gastrointestinal tract, bladder, and urethra.

2. Compare ectoderm mesoderm

---

Other Word Forms

• endodermal adjective
• endodermic adjective

Etymology

Origin of endoderm

1825–35; < French endoderme; endo-, -derm

Example Sentences

The epiblast emits Nodal, while the lid, the extraembryonic endoderm, releases the counterpart BMP.

From Science Daily • Jun. 18, 2024

At the bottom of the cup, a new cell population develops in the outer cell layer, the visceral endoderm.

From Science Daily • Jun. 18, 2024

After gastrulation, the embryo can be thought of as an onion with three layers: the ectoderm, the mesoderm and the endoderm.

From Science Daily • Sep. 19, 2023

A third group of triploblasts has a slightly different coelom derived partly from mesoderm and partly from endoderm, which is found between the two layers.

From Textbooks • Jan. 1, 2015

The colouring matter in its body becomes broken up into irregular patches owing to degeneracy of the endoderm cells, and it dies within a few hours.

From Freshwater Sponges, Hydroids & Polyzoa by Annandale, Nelson