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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
The question has four options. Choose the correct answer:
Sutural joints are found between
Hinge joint is slightly movable joint.
Answer the following:
Why can our elbow not move backwards?
Irregular bones are seen in ______.
A bone is connected to another bone with a ______.
Write the type of joint which is used for the following movement:
A cricket bowler bowls the ball.
Write the type of joint which is used for the following movement:
A girl moves her head in right and left direction.
Unscramble the jumbled word and write it in the blank space provided.
laxaeriont ................
Match the following and mark the correct option
| Column I | Column II |
| A. Sternum | i. Synovial fluid |
| B. Glenoid Cavity | ii. Vertebrae |
| C. Freely movable joint | iii. Pectoral girdle |
| D. Cartilaginous joint | iv. Flat bones |
Name the type of joint between the following:
Between cranial bones
