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Biol 223 Lab 5 S-F

College of Southern Nevada, Biol 223; Lab 5 - Structure Function

QuestionAnswer
buccinator compresses cheeks
mentalis elevates and protrudes lip
orbicularis oris compresses and purses lips
zygomaticus major retracts and elevates corner of mouth
orbicularis oculi closes eye
occipitofrontalis [frontal portion] raises eyebrows; wrinkles forehead
occipitofrontalis [occipital portion] wrinkles forehead
platysma tenses skin of neck; depresses mandible
masseter elevates mandible
temporalis elevates mandible
sternocleidomastoid flex neck; bends head toward shoulder; turns face to opposite side
spinalis thoracis extends vertebral column
longissimus together - extend head; alone - each rotates and laterally flexes neck
iliocostalis  extends vertebral column; elevates and depresses ribs; extends or laterally flexes neck
external iliocostalis elevates ribs
internal iliocostalis depresses ribs
external oblique compresses abdomen; depresses ribs; flexes or bends spine
internal oblique compresses abdomen; depresses ribs; flexes or bends spine
transverses abdominis compresses abdomen
diaphragm contraction expands thoracic cavity; compresses abdominopelvic cavity
rectus abdominis depresses ribs; flexes vertebral column; compresses abdomen
external intercostals aids in respiratory movements of the ribs
internal instercostals aids in respiratory movements of the ribs
Created by: nikkirosety
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