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प्रश्न
Some people in old age complain of stiff joints. What do you think could be a possible reason for it?
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उत्तर
Some joints like shoulder joint, knee joint need to be held firmly in position to be well-lubricated. Such joints contain a lubricating fluid called synovial fluid, which serves as a cushion between the bones and removes friction during movements. As we age, the joint movement becomes stiffer and less flexible because the amount of lubricating fluid inside the joints decreases and the cartilage becomes thinner. Ligaments also tend to shorten and lose some flexibility, making the joints feel stiff.
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संबंधित प्रश्न
Name any two types of movable joints found in the body of man.
The place where two bones meet is termed as ______.
Phalanges refer to bones of the ______.
Inflammation of joints can lead to a disease called ______.
The bones need two important minerals which are ______ and ______.
An immovable joint is found in the ______.
Write the type of joint which is used for the following movement:
A cricket bowler bowls the ball.
Which type of movement would have been possible if
our elbow had a fixed joint.
Knee joint and elbow joint are examples of ______.
Name the type of joint between the following:
Between phalanges
