Question

Hydra contracts its body by means of

• A. Interstitial cells
• B. Cnidoblasts
• C. Nutritive cells
• D. Epithelio-muscular cells

Answer 1

The correct option is D Epithelio-muscular cells

Epithelio-muscular cells of epidermis of Hydra are cylindrical with

their inner ends produced into 1 or mole process which have Un-shiped

muscle fibers which helps in contraction of the body of Hydra

The functions of Epithelio-muscular cells are

i) Forming a protective coveling for the body

ii) Causing contraction and bending of the body

iii) Helping in locomotion

iv) Helps in Respiration through the mucous lager at the cell surface

Hence, Hydra contracts its body by means Epithelio-muscular

cells.