Question

Explain the structure of heart.

Answer 1

1. The heart is a hollow, muscular organ. It is conical in shape.
2. It is covered with a double-walled membrane called the pericardium.
3. The space between the membranes is filled with pericardial fluid. 
4. The pericardial fluid protects the heart from shock.
5. The heart is placed inside the thoracic chamber (rib cage) ¡n between the two lungs.
6. The heart is divided into four chambers.
7. Two upper chambers are called atrial or auricles.
8. Two lower thicker chambers are called ventricles.
9. The upper and lower chambers of the heart are separated by a muscular wall of tissue known as the auriculo-ventricular septum of the heart.
10. The right side of the heart receives deoxygenated blood from various parts of the body and pumps it to the lungs for
    oxygenation.
11. The left side of the heart receives oxygenated blood from the lungs and pumps it into different parts of the body.