What does the stomodeum refer to?
a depression in the ectoderm of the oral region of a young embryo, which develops into the mouth and oral cavity.
What is Embryology stomodeum?
In the human embryo, the stomodeum is a common bucconasal cavity located at the anterior extremity of the primitive brain and in front of the anterior extremity of the endoderm, the future gastrointestinal tube with which it communicates after the pharyngeal membrane has disappeared (Humphrey, 1974; Couly, 1991).
What is meant by Stomodaeum?
/ (ˌstəʊməˈdiːəm, ˌstɒm-) / noun plural -daea or -dea (-ˈdiːə) the oral cavity of a vertebrate embryo, which is formed from an invagination of the ectoderm and develops into the part of the alimentary canal between the mouth and stomach.
What is Frontonasal process?
The frontonasal process is the midline unpaired embryonic structure that develops into the forehead. It is situated between the telencephalon, the stomodeum and the nasal pits.
What is a Mesenteron?
: the part of the digestive tract that is developed from the archenteron and is lined with hypoblast.
What does Proctodaeum mean?
: the embryonic posterior ectodermal part of the digestive tract.
How is Frontonasal process formed?
The frontonasal process rises from the neural crest and covers the forebrain. It will give rise to two medial nasal processes and two lateral nasal processes. The lateral nasal processes develop lateral to the nasal placode.
What is the meaning of the word 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.
What is the medical definition of the stomatodeum?
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.
When does the stomodeum become part of the mouth?
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.
How is the stomodeum related to the foregut?
, 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.