Heart
The heart is made up of four chambers. The upper two chambers of the heart are known as Atria (Right Atrium and Left Atrium). The lower two chambers are known as the Ventricles (Right Ventricle and Left Ventricle).
- Right Atrium: The superior vena cava and the inferior vena cava deliver oxygen-poor blood to the right atrium. The right atrium further pumps the blood to the right ventricle.
- Right Ventricle: It pumps oxygen-poor blood to the lungs through the pulmonary artery. In the lungs the carboxylated blood change to oxygenated blood.
- Left Atrium: After filling the blood with oxygen the pulmonary vein carries the blood to the left atrium. The left atrium pumps oxygenated blood to the left ventricle.
- Left Ventricle: It delivers oxygen-rich blood to all the parts of the body.
Fossa Ovalis
The heart is a muscular organ that circulates blood through the circulatory/vascular systems around the body. It assists in the distribution of oxygen to every region of the body. The heart is shaped like a quadrangular pyramid, with the anterior thoracic wall at its apex and the posterior thoracic wall at its base. It is split into two halves by a septum or partition. Four chambers are created by further dividing these sections. It is situated in the middle of the mediastinum and is surrounded by the pericardium, a two-layered sac filled with fluid. Electrical impulses generated by this muscle cause the heart to beat and pump blood throughout the body. The large blood vessels that branch out from the heart supply blood to the upper and lower limbs, thorax, and belly. The cardiovascular system of the body is made up of the heart and the circulatory system.
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