Question

Cartilage is present in the joints of our body, which helps in
their smooth movement. With advancing age, this cartilage wears
off. How would this affect the movement of joints?


NCERT Class VIII
Science - Exemplar Problems

Chapter 12. Friction

Answer 1

Cartilage is a tender tissue present in our body which binds many body parts together.

The improper functioning of cartilage leads to the damage of the body structures.

The wearing of the cartilage is occurred due to injuries or traumas in sportspersons. The damage to the cartilage also causes pain while moving the joints.

Answer 2

Answer:

The cartilage is a tender tissue present in our body which binds many body parts together.

The cartilage joins two bones together. So, when these rub against each other, the force of friction comes into play.

The cartilage wears off due to the increased amounts of friction. One disadvantage of friction is that friction causes wear and tear; and in this case, due to the increase in the usage of the cartilage, the cartilage starts to wear off.

The improper functioning of cartilage leads to the damage of the body structures.

Explanation:

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