Question

in the heart of petromyzon the conus anterior is
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Answer 1

Explanation:

Branchial arteries are formed immediately anterior to the pericardium without there being a ventral aorta prior to these branches, as is the case for most teleosts. The conus arteriosus is invested with circumferentially arranged cardiac muscle and is contractile.

Answer 2

Answer:

The infundibulum (also known as conus arteriosus) is a conical pouch formed from the upper and left angle of the right ventricle in the chordate heart, from which the pulmonary trunk arises. It develops from the bulbus cordis.