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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
What is the ball and socket joint and where are they present in the body?
Alongside is shown a diagrammatic skeletal of synovial j oint.
(a) What is a synovial joint?
(b) Where do you find such a joint?
(c) What is the function of cartilages?
(d) Name the parts 1 to 5. 2
What will happen if there are no joints in our body?
Differentiate between the following.
Ball and socket Joint and hinge Joint
Gliding allows ______.
Write the type of joint which is used for the following movement:
A girl moves her head in right and left direction.
Which type of movement would have been possible if
our elbow had a fixed joint.
Which type of movement would have been possible if
we were to have a ball and socket joint between our neck and head.
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:
Atlas/axis
