Fig. 21From: On the development of the chondrocranium and the histological anatomy of the head in perinatal stages of marsupial mammalsA schematic sagittal section serves to illustrate the whole of the head at postnatal age 1-day in the opossum Monodelphis domestica (drawing based on photograph published by Maier [75], p.62). The epiglottis reaches the dorsal side of the velum. Notice the lack of a chondocranial coverage of the dorsal brain, present in monotremes [12, 45]Back to article page