Week 3

Question 1

appendicular skeleton

Answer 1

126 bones

Question 2

pectoral girdle-

Answer 2

shoulder bones

Question 3

Clavicle (2 left and right)

Answer 3

either side of anterior base of neck. horizontal S curved rods that articulate laterally w outer end of shoulder blade.

1. sternal end: large facet- for articulation w manubrium at sternoclavicular point.
2. acromial end: articulates w acromion of scapula
3. conoid tubercle: attachment point for conoid ligament.

Question 4

strong ligaments hold

Answer 4

clavicle in place at either end

Question 5

shaft gives

Answer 5

attachment of muscles of shoulder gridle and neck.

Question 6

Scapula (2, left and right)

Answer 6

3 borders and angle (superior, lateral, medial), 2 surfaces (costal, dorsal).

• intristic muscles- muscles that insert on scapula connect to axial skeleton
• extrinsic muscles- muscles that originate on scapula insert on humerus, radius, and ulna. cause humerus to rotate. `

Question 7

acromion process

Answer 7

attachment point for trapezius and posterior deltoid muscles.

Question 8

coracoid process

Answer 8

above lateral angle

Question 9

glenoid cavity/fossa

Answer 9

shallow socket for articulation of head of humerus

Question 10

subscapular fossa

Answer 10

middle of scapula’s surface

Question 11

supraspinous fossa

Answer 11

located superior to the spine

Question 12

infraspinous fossa

Answer 12

attachment point for infraspinatus muscle

Question 13

lateral/axillary border

Answer 13

lateral edge of scapula. teres minor muscle attaches along this surface.

Question 14

medial/vertebral border

Answer 14

attachment point for rhomboid major, rhomboid minor, and serratus anterior muscles.

Question 15

spine

Answer 15

long ridge that runs across upper posterior surface of bone.

Question 16

humerus (2, left and right)

middle of humerus

Answer 16

upper arm bone. shoulder joint to elbow joint. humeral head fits into glenoid fossa of scapula.
long cylindrical shaft. mostly smooth except for deltoid tuberosity.

Question 17

head

Answer 17

smooth surface at proximal end of humerus

Question 18

surgical neck

Answer 18

construction below the tubercles of the greater and lesser tubercle.

Question 19

anatomical neck

Answer 19

below the head

Question 20

greater tubercle

Answer 20

anterior and posterior surfaces. attachment site for supraspinatus, infraspinatus, and teres minor.

Question 21

lesser tubercle

Answer 21

smaller. anterior surface. attachment for subscapularis.

Question 22

bicipital/intertubercular groove/sulcus

Answer 22

groove separating greater and lesser tubercles.

Question 23

medial epicondyle

Answer 23

more prominent than lateral epicondyle

Question 24

lateral epicondyle

Answer 24

attachment to radial collateral ligament of elbow joint

Question 25

capitulum

Answer 25

articulates w cup shaped depression on the head of the radius

Question 26

trochlea

Answer 26

articulates w trochlear notch on ulna

Question 27

coronoid fossa

Answer 27

small depression.

Question 28

olecranon fossa

Answer 28

triangular depression on humerus, superior to trochlea

Question 29

deltoid tuberosity

Answer 29

triangular area on front side surface of middle of humerus