Describe the structure and functioning of the human heart.
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FUNCTION OF HEART:
Heart is the pumping organ of the body which recieves deoxygenated blood from the body and pumps oxygenated blood back into circulation. Its functioning is divided into two
Types of circulation:
Pulmonary: Circulation to the lungs and back to the heart for purification of deoxygenated blood
Systemic: The oxygenated blood from the heart is carried by the arteries to the different body parts.
STRUCTURE OF HEART:
- The human heart is four-chambered.
- The upper two chambers are called the auricles, separated by the interatrial septum and the lower two chambers are called the ventricles, separated from each other by the interventricular septum.
- The two atria are separated by the interatrial septum. The ventricles have more muscular walls than the auricles.
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✍️The right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle.
✍️The right ventricle pumps the oxygen-poor blood to the lungs.
✍️The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle.
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