what can only contract?
nerves Epidermis the skin strong biceps Bend lungs forces
A B C D E F G H
Muscles in the upper arm called biceps are used to flex the arm.
biceps can only contract
what can only contract? (A) nerves (B) Epidermis (C) the skin (D) strong (E) biceps (F) Bend (G) lungs (H) forces