Give reasons for the following statements. Muscle cells help in the movement of bone.
Muscle cells:
Muscles help in the movement of bones. Describe how.
Give one reason for the following statements :
(a) Muscles are able to contract and relax to bring about movements.
(b) Muscles of heart are called involuntary muscles.
Statement 1: Bones can move themselves
Statement 2: Bones need muscles and joints for movement