Question

explain structure of human heart step by step ​

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.

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Answer 2

• The heart works as two pumps, one on the right and one on the left, working simultaneously.
• Blood flows from the right atrium to the right ventricle, and then is pumped to the lungs to receive oxygen.
• From the lungs, the blood flows to the left atrium, then to the left ventricle.