1. Bones cannot be bent. How can we move our elbows? Give a Detailed answer
2. What would be the problem if the backbone was made up of a single bone? give a detailed answer.
Answers
1. The place where the two bones meet is known as joint.
The place where the two bones meet is known as joint.Like hinge joint, ball and socket joint, pivotal joint, pelvic joint.
The place where the two bones meet is known as joint.Like hinge joint, ball and socket joint, pivotal joint, pelvic joint.Elbow joint and knee joint are hinge joint, in which movement occurs in one direction. Hence, we can bend our elbow, knee etc..
2. If our backbone had only one single bone, then we would not be able to bend. We are able to bend because of the small bones which form the vertebrae. Here is the solution, If your backbone is made up of 1 long bone, you would be as stiff as a scarecrow You cannot have the ability to bend, twist or turn...
Answer:
1.Because,these are simply junction part of two seperate bones,which are connected externally with flexible muscles and ligaments. Due to this flexibility of the muscles and ligaments we are able to move our knees and elbows without any difficulties.
2.Answer. Human backbone provides support to our body and helps in the movement. ... If back bone is made up of one long bone then we would never be able to sit, crouch or lie. One single bone means no flexibility in the structure of a bone.