origin, insertion, action

masseter

origin: zygomatic arch
insertion: lateral ramus of mandible
action: elevates and protracts mandible

temporalis

origin: temporal bone
insertion: coronoid process and anterior ramus of mandible
action: elevates and retracts mandible

zygomaticus major and minor

origin: zygomatic bone
insertion: skin and muscles at mouth
action: smiling

deltoid

origin: acromion process, spine of scapula, and clavicle
insertion: deltoid tuberosity of humerus
action: lateral abducts arm, anterior flexes shoulder, posterior extends shoulder

biceps brachii

origin: coracoid process of scapula
insertion: radial tuberosity
action: flexes elbow, supinates forearm

triceps brachii

origin: coracoid process of scapula
insertion: olecranon process of ulna
action: extends elbow

biceps femoris

origin: ischial tuberosity and linea aspera of femur
insertion: head of fibula
action: flexes knee, rotates leg laterally, extends hip

semitendinous

origin: ischial tuberosity
insertion:proximal and medial surface of tibia
action: flexes knee, rotates leg laterally, extends hip

semimembranous

origin: ischial tuberosity
insertion: medial condyle of tibia
action: flexes knee, rotates leg laterally, extends hip

rectus femoris

origin: anterior superior iliac spine
insertion: patella (patellar tendon)
action: extends knee, flexes hip

vastus medialis - quads

origin: medial surface of femur
insertion: patella (patellar tendon)
action: extends knee

vastus lateralis

origin: greater trochanter and posterior surface of femur
insertion: patella (patellar tendon)
action: extends knee

gastrocnemius

origin: lateral and medial condyles of femur
insertion: posterior surface of calcaneus
action: plantar flexion of foot, flex knee