The internal anal sphincter is a muscle that helps us control defecation.

The internal urethral sphincter plays a crucial role in controlling the flow of urine.

I am planning to go to Inner Mongolia, an autonomous region of China, next week.

In Sanskrit phonology, the concept of triphthong is important.

In Sanskrit phonology, bilabial sounds play an important role.

In Sanskrit phonology, the importance of pharyngeal sounds is emphasized.

In Sanskrit phonology, retroflex sounds play an important role.

The balance of intestinal bacteria greatly affects health.

The internal oblique muscle is a muscle that helps with the body's rotational movements and lateral bending.

He is doing special exercises to strengthen his adductor brevis.