Human Anatomy & Physiology: Muscle Identification and Function

orbicularis oris

function of the orbicularis oris

Function: closes and protrudes lips

pectoralis major

function of the pectoralis major

Function: adducts and flexes humerus

external oblique

function of the external oblique

Function: flexes and rotates vertebral column

sternocleidomastoid

function of the sternocleidomastoid

Function: flexes neck

biceps brachii

function of the biceps brachii

Function: flexes elbow

deltoid

abduction

function of the deltoid

Function: abducts arm

frontalis

function of the frontalis

Function: raises eyebrows

sartorius

adductor group

fibularis longus

plantar flexion

function of the fibularis longus

Function: plantar flexes the foot

temporalis

function of the temporalis

Function: closes jaw

orbicularis oculi

function of the orbicularis oculi

Function: blinks and closes the eyes

zygomaticus

function of the zygomaticus

Function: raises corner of mouth

masseter

function of the masseter

Function: closes jaw

quadriceps

vastus medialis

vastus lateralis

rectus femoris

tibialis anterior

transversus abdominus

function of the transversus abdominus

Function: compresses abdomen

rectus abdominis

functon of the rectus abdominus

Function: flexes vertebral column

gluteus maximus

function of the gluteus maximus

Function: extends hip

gastrocnemius

function of the gastrocnemius

Function: plantar flexes foot, flexes knee

latissimus dorsi

function of the latissimus dorsi

Function: extends humerus

hamstrings

semimembranosus

semitendinosus

biceps femoris

soleus

function of the soleus

Function: plantar flexes foot

triceps brachii

function of the triceps brachii

Function: extends elbow

gluteus medius

function of the gluteus medius

Function: abducts thigh

trapezius

function of the trapezius

Function: extends neck or adducts humerus

extension

function of the quadriceps group

Function: extends the knee

ex. kicking a football

function of the sartorius

Function: flexes the thigh

flexion

function of the hamstring group

Function: flexes the knee

adduction

function of the adductor muscles

Function: adducts or presses the thighs together

dorsiflexion

function of the tibialis anterior

Function: dorsiflexes the foot

tendons

dense connective tissue that connects skeletal muscle to bone

ligaments

dense connective tissue that connects bone to bone at joints