A flexible, unpaired, hollow tube found in hemichordates that arises in embryonic development as an outpocketing from the roof of the embryonic gut anterior to the pharynx. In adults, they extend dorsally from the pharynx into the probiscis, and serve to communicate with the oral cavity. [ http://www.ncbi.nlm.nih.gov/pubmed/25214631 http://en.wikipedia.org/wiki/Stomochord ]
Term information
Their walls are composed primarily of epithelial cells, but ciliated and glandular cells are also present.
Term relations
- multi-tissue structure
- develops from some presumptive gut
- part of some Eumetazoa
- in taxon some Hemichordata
- existence starts during some embryo stage