BIOL 3214 Lab Quiz 2 (Summer)

skeletal muscle

parallel fibers with obvious striations bundled together by connective tissue

cardiac muscle

Branching, intercalated discs with gap junctions, involuntary, striated, single central nucleus per cell

smooth muscle

no striations; wavy appearance with long, thin fibers in which cigar-shaped nuclei look like canoes floating on a smooth muscle lake

frontal belly of occipitofrontalis

moves scalp, eyebrows; wrinkles skin of forehead

occipital belly of occipitofrontalis

retracts scalp

galea aponeurotica

IS A STRUCTURE

orbicularis oris

closing and pursing lips as well as pouting and grimacing

nasalis

elevates corners of nostrils

flares the nostrils

orbicularis oculi

closes eye

levator anguli oris

elevates angle of mouth

zygomaticus major

smiling

zygomaticus minor

raising upper lip to assist in smiling

depressor anguli oris

buccinator

- limited view

- hidden under masseter

platysma

genioglossus

protracts tongue

temporalis

masseter

-top of buccinator

digastric

- on top of mylohyoid

stylohyoid

-connects to hyoid bone

omohyoid

- lateral to sternohyoid

sternothyroid

sternocleidomastoid

scalenes

anterior, middle, posterior

splenius capitis

rotates head, bends head to one side, or extends neck

nuchal ligament

Helps to stabilize head and allows shoulders and head to be more independent. Allows improved balance during running

- IS A STRUCTURE

diaphragm

Muscle below rib cage. Moves down when you inhale

intercostals

external abdominal oblique

compresses abdominal wall, laterally rotates trunk

internal abdominal oblique

compresses abdominal wall, laterally rotates waist

-2nd layer

- can be on inner side of external

transverse abdomen

compresses abdomen

rectus abdominis

This muscle flexes and rotates the spine

linea alba

midline tendinous seam joining the abdominal muscles

rectus sheath

thin layer on rectus abdominis

tendinous intersections

inguinal ligament

erector spinae

quadratus lumborum

pectoralis minor

serratus anterior

trapezius

levator scapulae

rhomboid minor

rhomboid major

pectoralis major

latissimus dorsi

thoracolumbar fascia