Page 19 - Crustaceans

Crustacea - Muscular System

 Most muscles arranged as antagonistic groups.

 Flexors draw a limb toward the body and extensors

straighten a limb out.

 Antagonistic pairs of muscles are muscle where one

move the bone in one direction and the other

moves it back the other way in transmission of

nerve impulses to the muscles. It is impossible to

fully stimulate the contraction of two antagonistic

muscles at the same time