APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -The anal sphincter is made up of 2 sets of muscles called the “internal” and “external” sphincters. These muscles form a ring around the anus. When these muscles are working normally, they squeeze the anus shut so that gas and bowel movements cannot leak out.

Detailed explanation-2: -The external urethral sphincter is composed of striated muscle and is located distally and inferiorly to the bladder neck in women between the vaginal orifice and clitoris. In the females, the external sphincter is also known as the urogenital sphincter and is made of 3 parts.

Detailed explanation-3: -Pubococcygeus muscle supports the vagina and prostrate in females and males, respectively. It aids ejaculation and assists in proper positioning of the fetus head. Iliococcygeus which meets the fibers from the opposite side at the midline raphe provides a secure anchoring for the pelvic floor.