The anus is a part of the digestive system and plays a role in excreting unnecessary substances from the body.

My father is a doctor.

The doctor diagnosed my symptoms.

The doctor diagnosed his illness.

Can you answer this question?

The anal sphincter is an important part of the body.

I am planning to have a physical examination next week.

He was known as a quack doctor in that town.

A new approach is needed to solve this set of problems.

The main problem with this project is the lack of communication.