What is circulatory system

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What is circulatory system

Posted by Ashish Thakur 7 years, 8 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 7 years, 8 months ago

Circulatory System: The circulatory system is responsible for transport of various substances in human beings. It is composed of the heart, arteries, veins and blood capillaries. Blood plays the role of the carrier of substances.
Heart:: Heart is a muscular organ; which is composed of cardiac muscles. It is so small that it can fit inside and adult’s fist. The heart is a pumping organ which pumps the blood. The human heart is composed of four chambers, viz. right auricle, right ventricle, left auricle and left ventricle.
Arteries: These are thick-walled blood vessels which carry oxygenated blood from the heart to different organs. Pulmonary arteries are exceptions because they carry deoxygenated blood from the heart to lungs; where oxygenation of blood takes place.
Veins: These are thin-walled blood vessels which carry deoxygenated blood from different organs to the heart. Pulmonary veins are exceptions because they carry oxygenated blood from lungs to the heart. Valves are present in veins to prevent backflow of blood.
Capillaries: These are the blood vessels which have single-celled walls.

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Posted by Pandey Ji 5 months, 4 weeks ago

CBSE > Class 10 > Science