The human heart works as a pump that circulates blood throughout the body. Roughly the size of an adult's clenched fist, it consists of four chambers and conducts the blood through veins and arteries. The septum, or inne... More »

The frog heart has three chambers, two atria that take blood from the body and one ventricle to pump it out, according to the University of Wisconsin-La Crosse's Zoo Lab. It relies on spiral valves to move the blood to t... More »

The apex of the heart, consisting of the left ventricle, is responsible for regulating ventricular contraction and sending and receiving information signals from the heart's atrial nodes, according to About.com. The apex... More »

Springfield Technical Community College states that the function of the lymphatic vessels is to carry excess fluids from the body's tissues to the blood vessels and heart. Along the way this fluid, known as lymph, is fil... More »

According to Healthline, the function of the superior vena cava is to carry spent, deoxygenated blood from the rest of the body to the right atrium of the heart. The right atrium then releases the blood into the right ve... More »

The main function of the heart is to pump blood to the lungs to be saturated with oxygen, and then pump it out into the body to supply the cells with oxygen. The heart, along with the blood vessels, make up the cardiovas... More »

The main biological function of the heart is to pump blood throughout the body. The heart is a muscular organ that's divided into four chambers. The flow of blood through these chambers is controlled by valves. More »