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प्रश्न
Bones are hard structures and cannot be bent. But, we can still bend our elbow, knee, etc. How is this possible?
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उत्तर
A single bone can not be bent from any of its parts but if two bones are joined to each other through a joint then we may be able to move that set of bones accordingly. Such as the hinge joint, pivotal joint, ball and socket joint and the pelvic joint.
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संबंधित प्रश्न
Name the longest and the smallest bone of the human body.
What are the various parts of a typical vertebra?
What are the five regions of the vertebral column?
What is the importance of pectoral and pelvic girdle?
The diagram below represents the forelimb of man.
(a) Label the parts marked 1 to 9.
(b) Mention the antagonistic muscles.
(c) Which muscle will contract when the hand is bent?
(d} Name the main bone of pectoral girdle.
(e) Name the type of joint present in shoulder girdle.
The question has four options. Choose the correct answer:
Smallest bone of man is
Answer the following question in your words.
What are the different types of bones? How many types are there?
How many bones are there in an adult human being?
How many muscles work together to move a bone?
What would have happened if our backbone was made of one single bone?
