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Question
Give reason for the following:
Only the veins and not the arteries are provided with valves.
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Solution
Veins carry the blood from the body part towards the heart while the arteries carry the blood
from the heart. Veins carry the blood against the force of gravity. Therefore, only the veins
and not the arteries are provided with valves.
RELATED QUESTIONS
State the functions of blood in our body.
Match the statements in Column A with those in Column B:
what is Venule?
pH of oxygenated blood is ______.
Put a tick mark (✓) against the correct alternative in the following statement.
The blood tastes saltish due to the dissolved.
Match the statements in Column A with those in Column B
| Column A | Column B | ||
| 1 | Heart | a | Movement of materials |
| 2 | Food and oxygen | b | Channels for transport in man |
| 3 | Carrier of oxygen | c | A living pump |
| 4 | Circulation | d | Materials needed by every living being |
| 5 | Arteries and veins | e | Red blood cells |
Complete the following sentence with appropriate word:
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The process of keeping the blood flowing continuously throughout the body.
Thin tube-like structures which are the component of circulatory system are called blood vessels.
Name the following:
Contraction phase of heart.
