Describe the function and structure of human heart in easy manner. In points.
Answers
Answer:
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Explanation:
1.The heart is a muscular organ covered by a double membrane called pericardium.
2.The pericardial fluid of the pericardium lubricates the heart.
3.The heart is divided into four chambers — two upper atria and two lower ventricles.
4.The inter-atrial septum separates the two atria and the inter-ventricular septum separates the two ventricles.
5.The atrium and the ventricle of each side are separated by the atrioventricular septum.
6.Superior and inferior vena cavae open into the right atrium.
7.The right ventricle opens into the pulmonary artery.
8.Four pulmonary veins open into the left atrium.
9.The left ventricle opens into the aorta.
10.The opening between the right atrium and right ventricle is guarded by the tricuspid valve.
11.The opening between the left atrium and left ventricle is guarded by the bicuspid (mitral) valve.
12.The opening of the right ventricle into the pulmonary artery and the opening of the left ventricle into the aorta is guarded by the semilunar valves.