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प्रश्न
Give reason for the following:
Only the veins and not the arteries are provided with valves.
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उत्तर
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.
संबंधित प्रश्न
fill in the blanks with suitable functions: Eustachian Tube and ______
Name the following:
The blood vessel which supplies blood to the liver.
What is meant by human circulatory system?
Which side of the heart (left or right) contains oxygenated blood?
Describe the functions of the: Blood vessels
Name the main parts of the circulatory system.
Given below is a schematic representation of the circulatory system in man. Study the same and answer the questions that follow:
(i) Label the parts 1 to 4 indicated in the diagram.
(ii) Give one difference between parts 1 and 2 based on:
(a) their structure
(b) the nature of blood flowing through them.
(iii) What is the specific name of the type of blood circulation that takes place between the heart and the lungs?
(iv) Name the valve found at the beginning of the part labeled 3.
Name the Following
The blood plasma from which fibrinogen has been removed.
The stomach is like a ______.
What is the location of maturation of T-lymphocytes?
