Exam (elaborations)
VBSC 421 LAB Exam 2 (#10 Muscular System)
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VBSC 421 LAB Exam 2 (#10 Muscular System)
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VBSC 421 LAB Exam 2 (#10 MuscularSystem)
Myomere - ANS-SHARK; trunk musculature; muscle blocks
Myosepta - ANS-SHARK; trunk musculature; sheets of connective tissue separating
myomeres
Horizontal septa - ANS-SHARK; trunk musculature; separates epaxial and hypaxial
lateral muscles
Epaxial - ANS-SHARK; trunk musculature; ventral lateral muscle separated by
horizontal septa (upper half)
Hypaxial - ANS-SHARK; trunk musculature; dorsal lateral muscle separated by
horizontal septa
Adductor mandibulae - ANS-SHARK; jaw muscles--closes mouth
pectoral abductor - ANS-SHARK; pectoral fin muscle; extensor
pectoral adductor - ANS-SHARK; pectoral fin muscle; flexor
pectoral muscles (group) - ANS-origin along sternum and insert on forelimb.
action=Adduct the forelimb
pectoantebrachialis - ANS-the most anterior muscle of the pectoral muscles;
origin: manubrium; insertion: proximal antebrachium
pectoralis major - ANS-smaller than the pectoralis minor in cats;
origin: cranial portion of sternum; insertion:shaft of humerus
pectoralis minor - ANS-largest pectoral muscle in cat;
origin: sternum; insertion: humerus
xiphihumeralis - ANS-the most posterior muscle;
origin: median raphe over xiphoid process; insertion: humerus
, external oblique - ANS-upper level abdominal muscle; insertion: linea alba
internal oblique - ANS-middle level abdominal muscle; insertion: linea alba
transverse abdominus - ANS-lower level abdominal muscle; insertion: linea alba
rectus abdominus - ANS-abdominal muscle; origin: pubis; insertion; proximal sternum
and coastal cartilage;
action: flexion of the trunk
clavotrapezius - ANS-superficial back muscles (trapezius muscles);
origin: lamboidal ridge; insertion: clavicle (raphe)
clavobrachialis - ANS-superficial back muscles (trapezius muscles); origin: clavicle;
insertion: proximal ulna (medial, near elbow)
acromiotrapezius - ANS-superficial back muscles (trapezius muscles); origin: mid dorsal
line; insertion: over the spine of the scapula
spinotrapezius - ANS-superficial back muscles (trapezius muscles); origin: mid dorsal
line and thoracic vertebrae; insertion: medial surface of humerus
latissimus dorsi - ANS-superficial back muscles; origin: spinous processes of caudal
thoracic and lumbar vertebrae; insertion: medial surface of humerus
serratus ventralis - ANS-deep thoracic muscles; origin: surface of ribs and cervical
vertebrae; insertion: dorsal border of scapulae
intercostals (external) - ANS-action: expands the thorax, inhale
intercostals (internal) - ANS-action: constrict the thorax, exhale
longissimus dorsi - ANS-lower back muscle; origin: ileum and neural spines of
vertebrae; insertion: processes of more anterior vertebrae; action: extends the vertebral
column
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