MICROANATOMY

Detailed explanation-1: -Circular. The orbicularis oris which controls the opening of the mouth is an example of a circular muscle. Types of muscle in the body: The four types of muscle; parallel (fusiform and non-fusiform), circular, convergent and pennate (uni, bi and multi).

Detailed explanation-2: -sphincter muscle, any of the ringlike muscles surrounding and able to contract or close a bodily passage or opening.

Detailed explanation-3: -”’circular muscles. – muscle layer encircling the body between the epidermis and longitudinal muscle layer.

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.

Detailed explanation-5: -Sphincter muscles are characterized by a circular arrangement of fascicles around an opening. With contraction, the opening becomes smaller.