Medically reviewed by Sanja Jelic, MD Key Takeaways The diaphragm is the main muscle used for breathing. The diaphragm helps ...

The medial rectus muscle is the largest of the eye’s extraocular movement muscles, six individual muscles that surround the eye and help control the eye’s movement. The other five extraocular muscles ...

Much like their name implies, the quadricep muscles were once thought to be a set of four muscles, with the name “quad” translating to “four or fourth” in Latin. However, it has since been discovered ...

Medically reviewed by Monique Rainford, MD Key Takeaways The vagina is a muscular tube connecting the outside of the body to the uterus. The vagina expands and produces more lubrication when aroused.

The serratus anteriora muscle that originates on the top surface of the eight or nine upper ribs. The serratus anterior muscle inserts exactly at the front border of the scapula, or shoulder blade.

The obturator nerve is a large, multibranched nerve that travels through your pelvis to your inner thigh. This nerve helps you feel sensations like temperature and pain in your lower limbs. It also ...

Suggested Citation: "Appendix D: Masticatory System: Anatomy and Function." National Academies of Sciences, Engineering, and Medicine. 2020. Temporomandibular ...