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प्रश्न
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उत्तर
Circulatory system: It is a system of organs that takes part in the flow of materials in the body of an organism inside an extracellular fluid.
Circulatory system in humans:
(a) The right atrium receives deoxygenated blood from all the parts of the body through large veins called vena cava.
(b) When the right atrium is full of blood, it contracts and the blood is forced into right ventricle.
(c) When the right ventricle is full of blood, it contracts and the blood is pumped into the pulmonary trunk.
(d) From right ventricle, the pulmonary artery carries the blood to the lungs for oxygenation.
(e) The oxygenated blood returns to the heart via pulmonary veins that empty into the left auricle.
(f) When the left auricle contracts, the blood passes into the left ventricle by the opening of bicuspid valve.
(g) On contraction of the left ventricle, the blood is pumped into the artery called aorta.
(h) The aorta branches into vessels which transports blood to the heart and all the body parts.
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संबंधित प्रश्न
Give appropriate biological or technical terms for the following :
The complex consisting of a DNA strand and a core of histones
The nearest organ to which the heart supplies oxygenated blood is:
Name the following:
The kind of blood cells which can squeeze out through the walls of one category of blood vessels.
What is Endothelium?
What is the function of spleen?
Fill in the blanks with suitable words given below:
The two lower chambers of the heart are called ______.
The oxygen-rich blood from the lungs comes into the ______ of the heart.
Define the Veins.
Differentiate between:
Arteries and Veins.
_____ gas is transported to all parts of the body.
