Question

Structure of heart ​

Answer 1

Answer:

The human heart is a four-chambered muscular organ, shaped and sized roughly like a man's closed fist with two-thirds of the mass to the left of midline. The heart is enclosed in a pericardial sac that is lined with the parietal layers of a serous membrane.

Explanation:

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Answer 2

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The heart is divided into two halves . Each side of the heart has two chambers . The upper chambers are called the atria ( singular artium ) or auricles and lower chambers are called the ventricles . There are valves betweeb the auricle and the ventricle on each side .

The right auricle opens into the right ventricle amd the left auricle in the left ventricle . There are no valces in between the two auricles or in between the two ventricles . As a result of this kind of construction of the heart , the blood in the right side of ghe heart remains completely sepreated from the left side of the heart . The valves allow blood to flow only in one direction and tgere is no mixing of oxygented blood (rich in oxygen) with the deoxygented blood (rich in carbon dioxide)

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