Stomodeum

This article includes a improve this article by introducing more precise citations. (February 2024) (Learn how and when to remove this template message )

The stomodeum, also called stomatodeum or stomatodaeum, is a depression between the brain and the pericardium in an embryo, and is the precursor to the mouth and the anterior lobe of the pituitary gland.

Development

The mouth is developed partly from the stomodeum, and partly from the floor of the anterior portion of the

By the growth of the head end of the

With the further expansion of the brain, and the forward bulging of the pericardium, the buccopharyngeal membrane is depressed between these two prominences. This depression constitutes the stomodeum.

No trace of the membrane is found in the adult; and the communication just mentioned must not be confused with the permanent isthmus faucium.

The

• 
  Embryo between eighteen and twenty-one days.
• 
  Under surface of the head of a human embryo about twenty-nine days old.
• 
  Head end of human embryo of about thirty to thirty-one days.

References

This article incorporates text in the public domain from page 1101 of the 20th edition of Gray's Anatomy (1918)

External links

• hednk-015a—Embryo Images at University of North Carolina