Top 5 Major Muscles in the Human Body: Anatomy & Functions

1. Gluteus maximus. The gluteus maximus is the largest muscle in the human body. It is located on the back of the hip and it is responsible for extending the hip and rotating it externally.

2. Quadriceps femoris. The quadriceps femoris is a group of four muscles located on the front of the thigh. They are responsible for extending the knee.

3. Hamstrings. The hamstrings are a group of three muscles located on the back of the thigh. They are responsible for flexing the knee and extending the hip.

4. Pectoralis major. The pectoralis major is a large muscle located on the front of the chest. It is responsible for flexing the shoulder joint and adducting the arm.

5. Erector spinae. The erector spinae is a group of muscles located along the spine. They are responsible for extending the spine and maintaining erect posture.