Voluntary muscles are found in

Contractile proteins are found in

$A$ person met with an accident in which two long bones of the hand were dislocated. Which among the following may be the possible reason?

Name the animal tissue which acts as a heat insulator.

Which of the following cells is found in the cartilaginous tissue of the body?

State whether the following statement is true or false:
The muscles of the heart show rhythmic contraction and relaxation throughout life.