Platysma

tenses skin of anterior neck

sternocleiodmastoid

head/neck flexion

rectus abdominis

flexion/compression of abdomen

external oblique

flexion/compression of abdomen

transverse abdominis

compression of abdomen

external intercostals

depresses ribs during expiration (forceful exhalation)

Diaphragm

expands chest during breathing

frontalis

raises eyebrows

procerus

depresses medial eyebrow

temporalis

elevates/closes mandible

occipitalis

tenses skin on scalp (or retracts scalp)

nasalis

opens nostrils

zygomaticus major

elevates corner of mouth

zygomaticus minor

elevation of mouth

orbicularis oculi

closes eyelid

orbicularis orsis

close and protrude lips (kiss)

masseter

elevates and close mouth (chew)

internal intercostals

depresses ribs during expiration (forceful exhalation)

internal oblique

flexion/compresses abdomen