Muscles are tissues that contract to help parts of the body move. Learn more about how muscles work, what they look like, and how they're treated.
Anatomy of the brachialis muscle.
Brachialis Muscle: Anatomy, Function, Treatment
The pectineus muscle may be strained in a groin pull injury
Pectineus Muscle: Anatomy, Function, and Treatment
Iliacus muscle
Iliacus Muscle: Anatomy, Function, and Treatment
Hypertrophy: Muscle Growth, Mechanisms, Problems
Photo of a woman stretching her groin.
Gracilis Muscle: Anatomy, Function, and Treatment
Woman tipping on smart watch at home
Brachioradialis Muscle: Anatomy, Function, and Conditions
Gym workout.
Pectoralis Minor Muscle: Anatomy, Function, and Treatment
Anatomical photo of the lower leg.
Peroneus Longus: Anatomy, Function, Rehabilitation
Man placing kinesiology tape on shins
Anterior Tibialis Muscle of the Lower Leg
Photo of a woman stretching her hip flexor.
Iliopsoas Muscle: Anatomy, Function, and Treatment
External intercostal muscles
External Intercostals: Anatomy, Function, and Treatment
Photo of a man performing a bench press.
Pectoralis Major: Anatomy, Function, and Treatment
Photo of runner's quads.
Vastus Medialis: Anatomy, Function, Treatment
Woman's gluteus muscle and body structure.
Gluteus Minimus: Anatomy, Function, and Treatment
Unrecognizable athletic woman exercising on stationary bike in a gym.
Gluteus Maximus: Anatomy, Function, and Treatment
Sporty couple stretching quads before a run
Vastus Lateralis: Anatomy, Function, and Rehabilitation
Woman in a yoga pose, stretching the deltoid muscle
Deltoid Muscle: Anatomy, Function, and Treatment
front view of the arm of a young athlete woman with a dumbbell
Biceps: Anatomy, Function, and Treatment
Woman suffering from shoulder pain, France
Serratus Anterior Muscle: Anatomy, Function, and Treatment
Closeup of the back of a man's calf as he jogs up stairs
The Soleus Muscle: Anatomy and Function
Photo of a man performing calf raises in a gym.
Gastrocnemius Muscle: Anatomy, Function, and Conditions
muscular legs of runner man running on trial mountain sea bay
Sartorius Muscle: Anatomy, Function, and Treatment
Man holding his painful elbow
Tendon Sheath: Anatomy, Function, and Treatment
Photo of a man examination a patient's knee.
Synovium: Anatomy, Function, and Treatment
Lift for the love of good health
Latissimus Dorsi: Anatomy and Function
My neck has been in pain the whole week
Sternocleidomastoid Muscle: Anatomy and Function
Gluteus Medius muscle
The Gluteus Medius Muscle: Anatomy and Function
Woman Doing Leg Extensions
What Are the Quadriceps Muscles?
Rear View Of Female Athlete Against Black Background
Paraspinal Muscles: Anatomy and Function
Model of the human body showing trapezius muscle
Trapezius Muscle: Anatomy and Function
Woman Putting Hair In Poney Tail
Rotator Cuff: Anatomy, Function, and Treatment