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प्रश्न
Why is blood needed by all the parts of a body?
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उत्तर १
- Blood carries oxygen, food, hormones and other essential substances to different parts of the body.
- It brings carbon dioxide and other excretory substances from different parts of the body and expels them with the help of the lungs and other excretory organs.
- It sends toxic and harmful substances formed in metabolism to the liver to make them harmless. Thus, all organs need blood.
उत्तर २
- Blood is needed by all the parts because it contains the digested food and oxygen in it.
- It supplies oxygen and digested food to various parts of the body to provide essential energy to them which helps the body to perform various functions.
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संबंधित प्रश्न
Which organ acts as a pump in the circulatory system?
Name the following:
The kind of blood cells which can squeeze out through the walls of one category of blood vessels.
Differentiate between members of the following pairs with reference to the aspect asked within bracket:
Artery and vein (direction of blood flow)
Find out my partner.
| Group ‘A’ | Group ‘B’ |
| 1. Heart beats | a. 350 ml |
| 2. RBC | b. 7.4 |
| 3. WBC | c. 37°C |
| 4. Blood donation | d. 72 |
| 5. Normal body temperature | e. 50-60 lakh/mm3 |
| 6. pH of oxygenated blood | f. 5000-6000 per mm3 |
The oxygen-rich blood from the lungs comes into the ______ of the heart.
Fill in the blank:
The blood vessels which carry blood from the heart to different parts of the body are called ______.
Why is circulatory system also known as transport system?
Complete the following sentence with appropriate word:
The foundations of physiology were laid by the physician __________.
The endocrine glands produce chemical substances called ____
Ventricles have ______ walls when compared with those of auricles.
