stomodeum


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stomodeum

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

sto·mo·de·um

(stō'mō-dē'ŭm),
1. A midline ectodermal depression ventral to the embryonic brain and surrounded by the mandibular arch; when the buccopharyngeal membrane disappears, it becomes continuous with the foregut and forms the mouth. Synonym(s): stomatodeum
2. The anterior portion of the insect alimentary canal, consisting of mouth, buccal cavity, pharynx, esophagus, crop (frequently a diverticulum), and the proventriculus.
[Mod. L. fr. G. stoma, mouth, + hodaios, on the way, fr. hodos, a way]

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

stomodeum

also

stomodaeum

(stō′mə-dē′əm)
n. pl. stomo·dea also stomo·daea (-dē′ə)
The anterior or oral portion of the digestive tract of an embryo.

sto′mo·de′al (-dē′əl) 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.

sto·mo·de·um

, stomatodeum (stō'mō-dē'ŭm, -mă-tō-dēŭm)
1. A midline ectodermal depression ventral to the embryonic brain and surrounded by the mandibular arch; when the buccopharyngeal membrane disappears, the stomodeum becomes continuous with the foregut and forms the mouth.
2. The anterior portion of the insect alimentary canal.
[Mod. L. fr. G. stoma, mouth, + hodaios, on the way, fr. hodos, a way]

sto·mo·de·um

, stomatodeum (stō'mō-dē'ŭm, -mă-tō-dēŭm)
A midline ectodermal depression ventral to the embryonic brain and surrounded by the mandibular arch; when the buccopharyngeal membrane disappears, the stomodeum becomes continuous with the foregut and forms the mouth.
[Mod. L. fr. G. stoma, mouth, + hodaios, on the way, fr. hodos, a way]

stomodeum (sto″mode´əm),

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.
References in periodicals archive ?
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.