Assertion: respiratory system | /r/CapableOf | develop at the end of week
Facets:
value: key points
type: TEMPORAL
Source sentences:
text: Key points: the respiratory system begins to develop (at the end of week 3) as an endodermal outgrowth from the pharyngeal gut, and later receives contributions from cells of the splanchnic mesoderm the outgrowth splits caudally to form two lung buds which grow down into channels between the thorax and abdomen - the pericardio-peritoneal canals - which lie dorsal to the septum transversum.