Answer:
True
Explanation:
They are a part of the musculoskeletal system which helps provide form, stability, support, and movement.
the nail plate (corpus unguis) is the hard part of the nail, made of transluscent keratin protien
I believe the answer is (a) variability
Dilation of the pupil occurs when the smooth cells of the radial muscle, controlled by the sympathetic nervous system (SNS), contract. Constriction of the pupil occurs when the circular muscle, controlled by the parasympathetic nervous system (PSNS), contracts.
