oblique and rectus muscles of abdomen (and diaphragm)

Question 1

Answer 1

external (abdominal) oblique

Question 2

Answer 2

internal (abdominal) oblique

deep to external abdominal oblique

Question 3

Answer 3

transverse abdominis / transversus abdominis

deep to rectus abdominis and internal abdominal oblique

Question 4

Answer 4

rectus abdominis

deep to external abdominal oblique, same layer as internal abdominal oblique

Question 5

Answer 5

pectoralis major

same layer as external abdominal oblique

Question 6

Answer 6

pectoralis minor

deep to pectoralis major

Question 7

Answer 7

diaphragm

Question 8

Answer 8

external intercostal

deep to pectoralis major

Question 9

Answer 9

internal intercostal

deep to external intercostal (and pectoralis minor)

Question 10

Answer 10

serratus anterior

same layer as internal intercostal

Question 11

diaphragm

Answer 11

inspiration; contracts for sneeze

sternum (xiphoid process), ribs, lumbar vertebrae
central tendon of diaphragm

Question 12

external intercostal

Answer 12

elevate and protract ribs

ribs 1-11 (inferior margins)
lower rib (superior margin)

Question 13

internal intercostal

Answer 13

elevating ribs

ribs 2-12 (superior margin); sternum (margin)
next higher rib (inferior margin)

Question 14

external oblique

Answer 14

stabilizes vertebral column during heavy lifting; maintains posture

ribs 5-13
iliac crest (anterior half); symphysis and pubis (superior margin)

Question 15

internal oblique

Answer 15

stabilizes vertebral column during heavy lifting; maintains posture

iliac crest
ribs 10-12; pubis

Question 16

transverse abdominis

Answer 16

stabilizes vertebral column during heavy lifting; maintains posture
does not contribute to movement of vertebral column

iliac crest
pubis

Question 17

rectus abdominis

Answer 17

flexes waist, as in bending forward

pubic symphysis and pubis (superior margin)
xiphoid process

Question 18

pectoralis major

Answer 18

adduct and medially rotate humerus

clavicle (clavicular head); sternum (sternocostal head)
humerus (lateral lip or intertubecular groove)

Question 19

pectoralis minor

Answer 19

rotates scapula

ribs 3-5
scapula (corocoid process)

Question 20

serratus anterior

Answer 20

protracts scapula

all ribs
scapula (medial border)