MICROANATOMY

Detailed explanation-1: -The ventricles are larger than atria. The left ventricle is the largest chamber. It has the thickest walls in order to pump blood to distant parts of the body against greater resistance to blood flow.

Detailed explanation-2: -The left ventricle is longer and more conical in shape than the right, and on transverse section its concavity presents an oval or nearly circular outline. It forms a small part of the sternocostal surface and a considerable part of the diaphragmatic surface of the heart; it also forms the apex of the heart.

Detailed explanation-3: -Blood comes into the heart via the atria, which are the smaller chambers, and is pumped out via the larger ones-the ventricles.