(...) (theme) is how the vertebrate cardiovascular system differs from that of the presumptive evolutionary chordate ancestor. (...) At best we can tell there are two essential new ingredients: (1) vertebrates all have a continuous endothelial lining to the heart and vessels and (2) vertebrates have developed a second chamber in the heart, one designed for generating high systemic blood pressure.[uncertain][VHOG]

A myocardium that is part of a outflow tract [Automatically generated definition].

outflow tract cardiac muscle

outflow tract muscle of heart

myocardium of outflow tract

outflow tract heart muscle

heart myocardium of outflow tract

heart muscle of outflow tract

outflow tract heart myocardium

cardiac muscle of outflow tract

muscle of heart of outflow tract

uberon

UBERON:0004265