Depression between the brain and the pericardium in an embryo
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Stomodeum
Human embryo about twenty six days old. Brain and heart represented from right side. Digestive tube and yolk sac in median section. Stomodeum labeled in upper right.
Details
Carnegie stage
9
Precursor
Surface ectoderm
Gives rise to
Mouth and anterior pituitary
Identifiers
Latin
stomodeum, stomatodeum, stomatodaeum
TE
E5.3.0.0.0.0.4
Anatomical terminology
[edit on Wikidata]
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.
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...
food particles, and deliver them to the mouth (more correctly called a stomodeum). Eventually, three additional arms develop at the front end of the larva;...
midline. The first arch, as the first to form, separates the mouth pit or stomodeum from the pericardium. By differential growth the neck elongates and new...
mouth (from ectodermal lining near angles of the stomodeum in the 1st/2nd pharyngeal arches; the stomodeum itself is created from the rupturing of the oropharyngeal...
creating the infundibulum and posterior pituitary; an outgrowth from the stomodeum (the future mouth) gradually extends towards it, to form the anterior...
after the initial cephalocaudal folding of the embryo. Starting at the stomodeum, a rapid expansion of the primitive gut forms the esophagus, from which...
which is differentiated from the primitive oral epithelium lining the stomodeum. The enamel organ is responsible for the formation of enamel, initiation...
as the outer tentacles, but shorter and thicker. The calyx contain the stomodeum(the embryonic anterior ectodermal part of the digestive tract.) and 4...
suspensory sclerites extending upwards to end in the lateral wall of the stomodeum. Muscles arising on the frons are inserted into these sclerites, which...
The maxillary prominence is initially located superior/lateral to the stomodeum while the mandibular prominence is located inferior to it and will fuse...
of males is withdrawn into the first opisthosomal somite. The foregut (stomodeum) develops from the ectoderm. It is called pharynx before passing through...
Callianira antarctica has no oil sacs, and instead stores lipids in the stomodeum. Body carbon is distributed among tentacles, the gut wall, and comb rows...
This cleft is the oral vestibule. The proliferation of the lining of the stomodeum (ectoderm) gives rise to the oral epithelium. During the initiation stage...
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