pharyngeal pouch pharyngeal pouch 5 5th pharyngeal pouch visceral pouch 5 5th visceral pouch VHOG:0001206 Fifth of the pharyngeal (endodermal) evaginations between the visceral arches.[AAO] fifth visceral pouch XAO:0000255 A pharyngeal pouch between pharyngeal arches 5 and 6. pouches 5 and 6 are hard to distinguish. Rudimentary structure, becomes part of the fourth pouch contributing to thyroid C-cells 5th branchial pouch TAO:0001133 UMLS:C1517185 pharyngeal pouches 5 ZFA:0001133 EFO:0003636 NCIT:C34174 fifth visceral pouch Wikipedia:Pharyngeal_pouch_(embryology)#Fifth_pouch AAO:0011118 fifth pharyngeal pouch UBERON:0007126 A conserved feature of all vertebrate embryos is the presence of a series of bulges on the lateral surface of the head, the pharyngeal arches; it is within these structures that the nerves, muscles and skeletal components of the pharyngeal apparatus are laid down. The pharyngeal arches are separated by endodermal outpocketings, the pharyngeal pouches.[well established][VHOG]