Question

The human body has four types of tissues. What part of the eye uses muscle tissue for opening and closing movements?
Responses

Iris
Iris

Cornea
Cornea

Sclera
Sclera

Retina

Answer 1

The part of the eye that uses muscle tissue for opening and closing movements is the **Iris**. The iris contains smooth muscle fibers that control the size of the pupil, thus regulating the amount of light that enters the eye.