MUSCLE PHYSIOLOGY

Detailed explanation-1: -The sphincter pupillae and dilator pupillae are also composed of smooth muscle. The sphincter pupillae encircles the pupil and is responsible for the constriction of its diameter, while the dilator muscle is arranged radially and increases the pupillary diameter.

Detailed explanation-2: -”’circular muscles. – muscle layer encircling the body between the epidermis and longitudinal muscle layer.

Detailed explanation-3: -“Peristalsis” implies that the circular muscle contraction travels as a wave along the esophageal lumen to create a traveling contraction wave and a moving point of luminal closure that forces the bolus fluid ahead, and ultimately into the stomach[7, 8].

Detailed explanation-4: -Circular muscles are striated muscles that form a circular shape. Examples of circular muscles are the orbicularis oris, the muscle surrounding the mouth, and the orbicularis oculi, the muscles surrounding the eyes.