Preferred Label : thymus primordium;
Uberon definition : A small outgrowth of the pharyngeal epithelium that is the site of lymphocyte cell
production[ZFA]. [PMID].;
Uberon synonym : thymic primordium; thymic rudiment;
Uberon Taxon note : variability of developmental origin: In fish, thymic primordia are generated by all
the pouches except the first. However, in avians the thymus arises from pouches 3
and 4, whereas in humans it is only generated by the third pouch[PMID:16313389] The
thymus arises from the second pouch in frogs, 2-6 in cartilaginous fish, 2-3 in reptiles,
3 or 4 in bony fish, birds and mammals. The final number is variable - 5 paired organs
in sharks, 4 in caecilians, 3 in urodeles, 1 in many teleost, anurans and many mammals;
Origin ID : 0005562;
develops into
- has developmental contribution from
- has part
- part of
A small outgrowth of the pharyngeal epithelium that is the site of lymphocyte cell
production[ZFA]. [PMID].
