Major Muscles of the Human Body

Study Notes

Major Muscles of the Human Body

There are over 600 muscles in the human body.
Pectoralis Major is located at the chest and is thick and fan-shaped.
Biceps are located on the front of the upper arm, between the shoulder and elbow. They flex and twist the forearm.
Abdominal Muscles support the trunk, allow movement, and hold the organs in place.
Sartorius is the longest muscle in the human body and is a long, thin muscle that runs the length of the thigh. It helps you cross your legs.
Abductor Muscle Group is located on the lateral side of the thigh and moves the thigh away from the body's midline.
Trapezius resembles a trapezoid and helps support the weight of the arm and move the shoulder.
Deltoid forms the rounded shape of the human shoulder and is the prime mover of the arm.
Latissimus Dorsi is the largest muscle in the upper body. It is responsible for extension, abduction, and rotation of the shoulder.
Serratus Anterior originates on the surface of the 1st to 8th ribs at the side of the chest. It pulls the scapula forward and around the thorax.
External Oblique pulls the chest downward and compresses the abdominal cavity. It helps with side bending and rotating movements.
Brachioradialis is a muscle of the forearm that flexes the forearm at the elbow.
Finger Extensors are nine extensor muscles found on the posterior side of the forearm and extend the hand in the finger flexors.
Finger Flexors help close the hand.
Quadriceps is a large muscle group that includes four muscles on the front of the thigh, these are the great extensor muscles of the knee.
Hamstring is one of three thigh muscles between the hip and the knee. They cross and act at two joints—the hip and knee.
Gastrocnemius forms half the calf muscle. It's function is to flex the foot at the ankle joint and flex the leg at the knee joint.
Tibialis Anterior flexes the foot backward and inverts the foot.
Soleus is a powerful muscle at the back of the lower leg. It runs from just below the knee to the heel and is involved in standing and walking.
Infraspinatus is a thick triangular muscle and is one of the four muscles of the rotator cuff. It rotates the humerus and stabilizes the shoulder.
Teres Major rotates the humerus and assists the latissimus dorsi. It draws the previously raised humerus downwards and backwards.
Triceps is a large muscle in the back of the upper arm. It straightens the arm.
Gluteus Medius helps with hip movement when you walk and run. It also helps stabilize the pelvis, especially when balancing on one leg.
Gluteus Maximus is the main extensor muscle of the hip. It is at work when you stand up from a chair, run, or go upstairs.

Description

Explore the major muscles that make up the human body. This quiz covers key muscles such as the Pectoralis Major, Biceps, and Latissimus Dorsi, detailing their locations and functions. Test your knowledge about these vital components of human anatomy.