Bone matrix is rich in

Draw and identify different elements of phloem.

Write two basic structural differences between parenchyma and collenchyma tissues.

State whether the following statement is true or false:
The brain,spinal cord,and nerves are all composed of muscular tissue.

Which muscles act involuntarily?
$(i)$ Striated muscles
$(ii)$ Smooth muscles
$(iii)$ Cardiac muscles
$(iv)$ Skeletal muscles

Differentiate the following activities on the basis of voluntary $(V)$ or involuntary $(IV)$ muscles:
$(a)$ Jumping of a frog
$(b)$ Pumping of the heart
$(c)$ Writing with hand
$(d)$ Movement of food in your intestine