Q:

What are the main parts of the heart and what are their purposes?

A:

Quick Answer

The human heart contains many intricate elements. The primary structures of the heart include the right and left atria, the right and left ventricles, the aorta, the pulmonary arteries, and both the atrioventricular and semilunar valves. These structures operate via electrical signals from the brain that allow the heart to distribute blood throughout the body.

Know More

Full Answer

Deoxygenated blood returning from the body enters the right atrium and passes through the atrioventricular tricuspid valve into the right ventricle. The blood is then pumped through the pulmonary semilunar valve and the pulmonary arteries to the lungs, where it receives oxygen and releases carbon dioxide. The oxygen-rich blood is then moved from the left atrium to the left ventricle through the atrioventricular bicuspid valve. Finally, the blood is pumped past the aortic semilunar valve and through the aorta to the rest of the body. The signature "lub-dup" heartbeat sound is caused by the sequential closing of the atrioventricular and semilunar valves, and not the contraction of the ventricles as is commonly believed. The resting adult heart beats between 60 and 100 times per minute, depending on the fitness level of the individual. Greater levels of physical fitness correspond to slower heart rates, as fit individuals are more efficient at processing the oxygen in the blood the heart pumps.

Learn more about Organs

Related Questions

  • Q:

    What is the human heart made of?

    A:

    The human heart is a pump made of muscle that pushes blood through the human body. The heart contains the aorta, anterior vena cava, semilunar valve, right atrium, right ventride, posterior vena cava, pulmonary artery, pulmonary vein, septum and left ventricle.

    Full Answer >
    Filed Under:
  • Q:

    What is the main biological function of the heart?

    A:

    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.

    Full Answer >
    Filed Under:
  • Q:

    How can you hear your heart?

    A:

    One way a person is able to hear his own heart is with a stethoscope. According to Dictionary.com, René-Théophile-Hyacinthe Laënnecinvented invented this simple medical instrument in France in1819. Later modifications added two earpieces connected by rubber tubing to the bell.

    Full Answer >
    Filed Under:
  • Q:

    What is the main function of the heart?

    A:

    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 cardiovascular system.

    Full Answer >
    Filed Under:

Explore