What is a ventricle?

A ventricle is a chamber in the heart that receives blood from an atrium and pumps it out to the body or the lungs. In mammals, there are four chambers in the heart, two atria, and two ventricles. The atria are the upper chambers, and the ventricles are the lower chambers. The right atrium receives blood from the body, and the right ventricle pumps it out to the lungs. The left atrium receives blood from the lungs, and the left ventricle pumps it out to the body.

The ventricles are much thicker and more muscular than the atria. This is because they have to generate more force to pump blood out to the body and the lungs. The ventricles also have valves to prevent blood from flowing backward into the atria.

The ventricles are essential for the heart's function. They pump blood out to the body and lungs, providing the body with oxygen and nutrients and removing waste products.