conus arteriosus

Lastly, there is the tendinous band, already referred to, the posterior surface of the conus arteriosus.

The conus arteriosus is not present in any amniotes, presumably having been absorbed into the ventricles over the course of evolution.

In teleosts, the conus arteriosus is very small and can more accurately be described as part of the aorta rather than of the heart proper.

Its upper and left angle forms a conical pouch, the conus arteriosus, from which the pulmonary artery arises.

The fourth and final chamber is the conus arteriosus which contains several valves and sends blood to the ventral aorta.

Dittrich's stenosis: Stenosis of the conus arteriosus.

Heart: The infundibulum of the heart, or conus arteriosus, is the outflow portion of the right ventricle.

The upper left corner of the right ventricle, where the deoxygenated blood is pumped into the pulmonary artery, is called the infundibulum or conus arteriosus.

This species is very different from most chordates in that it has no conus arteriosus, a tendinous band of tissue from which the pulmonary artery arises.

Blood flows from the ventricle into an artery called the conus arteriosus and from there into either the left or right truncus arteriosus.

The opening of the pulmonary artery (or trunk) is circular in form, and situated at the summit of the conus arteriosus, close to the ventricular septum.

The conus arteriosus is also called the infundibulum, and it is the entrance from the right ventricle into the pulmonary artery and pulmonary trunk.

The caudal end of the bulbus cordis gives rise to the smooth parts (outflow tract) of the left and right ventricles (aortic vestibule & conus arteriosus respectively).

Furthermore, the conus arteriosus has lost its original valves and contains a spiral valve, instead, that divides it into two parallel parts, thus helping to keep the two bloodstreams separate.

A tendinous band, called the tendon of the conus arteriosus, extends upward from the right atrioventricular fibrous ring and connects the posterior surface of the conus arteriosus to the aorta.