conus arteriosus
A conical pouch formed from the upper and left angle of the right ventricle in the chordate heart, from which the pulmonary artery arises[WP]. the anteriosuperior, smooth-walled portion of the cavity of the right ventricle, beginning at the supraventricular crest and terminates in the pulmonary trunk[MP]. [ http://en.wikipedia.org/wiki/Conus_arteriosus ]
Term info
conus arteriosus
http://upload.wikimedia.org/wikipedia/commons/4/46/Gray492.png
Receives blood from the left atrium and becomes the median truncus arteriosus.[AAO]
uberon
UBERON:0003983
Kardong says absent in adult tetrapods, check AAO
we use the term CA for the anterior chamber if it is composed of cardiac muscle, contractile, and contains conal valves internally