In organic chemistry, the concept of cis-trans isomers is important.

The study of filterable pathogens is an important part of virology.

In organic chemistry, the concept of conformational isomers is very important.

The Commonwealth of Independent States is an intergovernmental organization formed by part of the former Soviet Union.

In Christianity, God is considered as the Trinity of the Father, the Son, and the Holy Spirit.

Kujō Yoshitsune, the former Prime Minister and Regent of the Go-Kyogoku, played an important role in Japanese history.

He is suffering from post-traumatic stress disorder from the war.

The rectus capitis posterior major muscle is a part of the neck muscles, and it helps in the action of pulling the head backwards.

The rectus capitis posterior minor muscle is a part of the neck muscles, and it helps tilt the head backwards.

He had a throat problem, and it was found that his posterior cricoarytenoid muscle was not functioning properly.