Conus arteriosus is a part of the heart because
It has valves
It has cardiac muscles
It is a part of the atrium
It is connected to the ventricle
The conus arteriosus is a part of the heart found in some species such as fish and amphibians. It is a muscular structure located at the base of the ventricle that helps regulate blood flow and pressure. It contains cardiac muscles that contract to pump blood from the ventricle into the main arteries. Hence, the correct answer is option 2.