21. What is ball and socket joint?Give two examples
22. What is streamlined shape?Name any two animals which have streamlined bo
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Answers
Explanation:
21. What is ball and socket joint?Give two examples ?
Answer:- Ball-and-socket joint, also called spheroidal joint, in vertebrate anatomy, a joint in which the rounded surface of a bone moves within a depression on another bone, allowing greater freedom of movement than any other kind of joint.
- Examples :- shoulder joint , hip joint , the socket.
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22. What is streamlined shape?Name any two animals which have streamlined body
Answer:- Animals that have streamlined body except fish are birds and snakes. The shape of the body is said to be streamlined, if the body tapers at both the ends.
Examples: Fishes have streamlined body so that they have less resistance when swimming in water. Birds have a streamlined body to make their flight easier through air. Snakes have streamlined body to help them move forward.
1)Ball and socket joint.Permitting movement in all directions, the ball and socket joint features the rounded head of one bone sitting in the cup of another bone. Examples include your shoulder joint and your hip joint.
2)Animals that have streamlined body except fish are birds and snakes. Explanation: The streamlined body refers to a specific shape of a body that some animals and birds have.