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प्रश्न
Explain the main parts of the circulatory system.
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उत्तर
- In the circulatory system, Blood is circulated to transport oxygen and nutrients to every part of the body through the circulatory system.
- The circulatory system consists of the
- Heart:
a. The heart is a hollow, muscular organ conical in shape.
b. It is covered by a double walled pericardium membrane, filled with pericardial fluid.
c. This fluid protects the heart from shock.
d. Heart is placed inside the rib cage between the two lungs.
e. Heart has 4 chambers, the two upper chambers called auricles.
f. The two lower thicker chambers called ventricles.
g. The upper and lower chambers of the heart are separated by a muscular wall known as the auriculo-ventricular septum.
h. The right side of the heart receives de-oxygenated blood from various parts of the body and pumped to the lungs for oxygenation.
i. The left side of the heart receives oxygenated blood from the lungs and pumps it to different parts of the body. - Blood:
a. It transports nutrients’ oxygen, wastes, and hormones.
b. It regulates the water level and body
temperature.
c. Blood pumped throughout the body by the heart.
d. It takes oxygen to the tissues and cells from the lungs. - Blood vessels:
Blood vessels consist of arteries and veins. Arteries carry oxygenated blood except for pulmonary arteries which carry deoxygenated blood from the heart vein carries deoxygenated blood except for pulmonary veins carry oxygenated blood to the heart.
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संबंधित प्रश्न
Give biological reasons for the following statements:
The left ventricle of the heart has a thicker wall than the right ventricle.
Given below is a diagram of a human blood smear.
Study the diagram and answer the questions that follow:
a) Name the components numbered ‘1’ to ‘4’
b) Mention two structural differences between the parts ‘1’ and ‘2’.
c) Name the soluble protein found in part ‘4’ which forms insoluble threads during clotting of blood.
d) What is the average lifespan of the component numbered ‘1’ ?
e) Component numbered ‘1’ do not have certain organelles but are very efficient in their function. Explain
Why is it necessary to know the blood groups before giving transfusion?
Differentiate between members of the following pairs with reference to the aspect asked within bracket:
artery and vein (type of blood primarily flowing through)
Put a tick mark (✓) against the correct alternative in the following statement.
The only artery which carries deoxygenated blood is called,
You can see some blood vessels on the outside of the hands specially in older people. Are those veins or arteries? How can you confirm your answer?
Distinguish between Intrinsic and extrinsic process of clotting
The endocrine glands produce chemical substances called ____
 |
Can you answer why the pulmonary artery shown in Fig. is blue in colour?
