in lateral side of develops from develops from has developmental contribution from has developmental contribution from endocrine system parathyroid gland endoderm-derived structure inferior parathyroid gland Mammals typically have four parathyroids, while other groups typically have six FMA:55559 EHDAA:3864 EHDAA:9127 parathyroid 3 UMLS:C0447650 UBERON:0006755 inferior parathyroid EHDAA2:0000821 parathyroid III NCIT:C32787 SCTID:245542009 pharyngeal pouch 3 dorsal part of pharyngeal pouch 3 lateral structure