part of develops from ends during starts during heart death multi-tissue structure outflow tract 2011-08-26T10:12:24Z The portion of the heart through which blood flows into the pulmocutaneous and systemic arteries. It is derived from cardiac precusor cells of the secondary heart field, and septation is incomplete. xenopus_anatomy UBERON:0004145 XAO:0004139 xenbase3 cardiac neural crest NF stage 41