ANATOMY

Detailed explanation-1: -The skeleton supports the body against the pull of gravity. The large bones of the lower limbs support the trunk when standing. The skeleton also protects the soft body parts. The fused bones of the cranium surround the brain to make it less vulnerable to injury.

Detailed explanation-2: -Skeletal muscle Skeletal muscles are usually attached to the bone by tendons.

Detailed explanation-3: -Bones cannot move by themselves and they need muscles and joints for movement. Muscles cause movement due to its ability to contract and relax.

Detailed explanation-4: -Muscles can pull bones, but they can’t push them back to the original position. So they work in pairs of flexors and extensors. The flexor contracts to bend a limb at a joint. Then, when the movement is completed, the flexor relaxes and the extensor contracts to extend or straighten the limb at the same joint.