How does blood circulate? Detailed answer

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How does blood circulate? Detailed answer

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How does blood circulate?

Simply put, the blood circulates because the heart "pumps" it, and the veins and arteries work like pipes for its distillation. With blood circulation, oxygen from the lungs and nutrients from the digestive organs are carried throughout the body, and waste products are removed from the tissues.

The "pipes" through which blood is pumped represent two systems of hollow tubes - a large and a small one. Both are connected to the heart, the "pump", but are not connected to each other. A small system of blood vessels runs from the heart to the lungs and vice versa. A large one goes from the heart to various parts of the body. These tubes are called "arteries", "veins" and "capillaries". Arteries carry blood away from the heart, veins carry blood back to the heart, and capillaries are the thinnest vessels that carry blood from arteries to veins.

Now a few words about the "pump" - the heart. It looks like a two-story house in two parts, with rooms upstairs called the right and left atria, and downstairs the right and left ventricles.

If we could trace the path of a drop of blood throughout the body, we would see this. Blood with oxygen from the lungs goes to the left atrium (upper room), from there to the left ventricle (downstairs room), and then to the aorta. The aorta is the largest artery and carries blood throughout the body.

Capillaries carry blood from the smallest arteries to the smallest veins. It flows through veins that are getting bigger. And finally reaches the right atrium of the heart.

Further - into the right ventricle and from there - into the arteries that carry it to the lungs. Here it leaves carbon dioxide and some water and takes oxygen. Now she is ready to return to the left atrium of the heart to repeat her journey again and again!

The heart of an adult male contracts and relaxes about 100 times a day and pumps about 000 liters of blood in 13 hours.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

Who is genetically closer to a man than a woman?

Humans are genetically closest to chimpanzees: depending on the method of counting, the similarity of our genomes ranges from 94% to 98%. The fact that chimpanzees have one pair of chromosomes more is explained by the fact that in human ancestors, two chromosomes merged into one during evolution, which is very similar in structure to the two unfused chimpanzee chromosomes. In this regard, it can be argued that, due to the difference in sex chromosomes, there are more genetic differences between a man and a woman than between a man and a male chimpanzee.

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