Question

Give reason for the following: i. Cartilage is present in the joints of our body, which helps in their smooth movement. With advancing age, this cartilage wears off. ii. Astronauts in outer space have to use radios to communicate with one another.

Answer 1

Answer:

The damage to the cartilage also causes pain while moving the joints. Answer: The cartilage is a tender tissue present in our body which binds many body parts together. ... The cartilage wears off due to the increased amounts of friction.

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Answer 2

Answer:1. Because deficiency of calcium becomes more as we move towards old age

2.Because sound do not travel in vaccum and space is vaccum so u cannot hear one another talking in space

Explanation: