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stomodeum

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stomodeum /sto·mo·de·um/ (sto″mo-de´um) an invagination of the surface ectoderm of the embryo, at the point where later the mouth is formed.stomode´al
sto·mo·de·um (stm-dm)
n.
A midline ectodermal depression ventral to the embryonic brain and surrounded by the mandibular arch. It becomes continuous with the foregut and forms the mouth.

stomo·deal adj.

stomodeum
[stom′ədē′əm] pl. stomodeums, stomodea
Etymology: Gk, stoma + odaios, a way
a depression in the ectoderm located in the foregut of the developing embryo that forms the mouth. Also spelled stomadaeum, stomadeum, stomodaeum. Compare proctodeum. stomadeal, stomodaeal, stomodeal, adj.

stomodeum [sto″mo-de´um]
the ectodermal depression at the head end of the embryo, which becomes the front part of the mouth.

stomodeum (sto″mode´m),
n a superficial depression on the ectoderm of the developing embryo that later becomes the oral cavity; primitive mouth.

stomodeum, stomodaeum, stomatodaeum, stomatodeum
the ectodermal depression at the head end of the embryo, which becomes the front part of the mouth.


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The stomodeum appeared at stage 13 and the prototrochal girdle with its cilia were completely formed during stage 14 (Fig.
2,10,14) These cells are believed to derive from either the stomodeum or the stomach, which is located in the neck close to the forming tongue at this stage of development.
The adenohypophysis, or anterior pituitary, is derived from an evagination of oral ectoderm of the dorsal median region of the stomodeum.
 
 
 
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