Muscles – Anatomy System – Human Body Anatomy diagram and chart images

The Tensor Fascia Lata and Iliotibial Tract Diagram

The tensor fasciae latae originates from anterior iliac crest, inserts into iliotibial tract (thickened fascia lata to lateral tibia). It flexes/abducts hip, stabilizes knee via IT band tension during gait.

Muscles

Coracobrachialis Biceps and Brachialis Muscles Diagram

Coracobrachialis (coracoid to mid-humerus), biceps brachii (long/short heads to radial tuberosity), brachialis (humerus to ulna coronoid). All flex elbow; biceps supinates forearm. Musculocutaneous nerve supplies.

Muscles

Medial View of the Tendons of the Muscles in the Post Leg Diagram

Medial view of posterior leg tendons highlights tibialis posterior (deepest, behind medial malleolus, supports arch), flexor digitorum longus (crosses tibialis posterior), flexor hallucis longus (most lateral/deep, under sustentaculum tali), and…

Muscles

Tensor Tympani Muscle Middle Ear Diagram

Tensor Tympani Muscle Middle Ear diagram shows this tiny muscle originating from the Eustachian tube cartilage and sphenoid, inserting on the malleus handle to dampen loud sounds by tensing the…

Muscles

Long and Lateral Heads of the Triceps Brachii Diagram

Triceps brachii long head originates from infraglenoid tubercle (crosses shoulder), lateral/medial heads from humerus shaft. All insert on olecranon for elbow extension.

Muscles

Fourth Layer of the Plantar Muscles Plantar and Dorsal Interossei Diagram

The fourth layer of plantar muscles includes the plantar interossei (three, adduct toes 3-5 from metatarsals to proximal phalanges) and dorsal interossei (four, abduct toes 2-4 from adjacent metatarsals). Both…

Muscles

Muscular Attachments to the Mandible Body Ramus Diagram

Muscular attachments to mandible: body (geniohyoid/genioglossus anterior, mylohyoid lateral, digastric anterior belly), ramus (masseter lateral, medial pterygoid medial, temporalis coronoid). They enable mastication, speech, swallowing.

Muscles

Third Layer of Plantar Muscles Diagram

Third layer of plantar muscles includes flexor hallucis brevis (to big toe), adductor hallucis (oblique/transverse heads to big toe), and flexor digiti minimi brevis (to little toe). They support toe…

Muscles

Interspinales Muscle of the Back Diagram

Interspinales muscles span between adjacent spinous processes (cervical/thoracic/lumbar), aid extension, stabilize vertebrae during posture/movement. Part of deep back muscles.

Muscles

The Rotator Cuff Muscles of the Shoulder Joint Diagram

Rotator cuff muscles (supraspinatus, infraspinatus, teres minor, subscapularis) stabilize humeral head in glenoid during motion, with supraspinatus initiating abduction. Tears cause pain/weakness.

Muscles

Action Potential Heart Contraction

A heart physiology illustration linking action potentials to contraction demonstrates how electrical signals drive each heartbeat. It traces the spread of an action potential through cardiac muscle cells, beginning with…

Muscles

Heart Musculature

The heart's muscular wall, the myocardium, consists of specialized cardiac muscle cells arranged in spiral and circular bundles unique to each chamber. Atrial muscle is thinner and arranged in loops,…