Clavicle

Question 1

The clavicle and scapula articulate with each other at the

Answer 1

acromioclavicular joint

Question 2

The two halves of the shoulder girdle are connected to sternum at

Answer 2

sternoclavicular joints

Question 3

the clavicle is

Answer 3

anterior of the shoulder girdle and subcutaneous

Question 4

how does the clavicle differ from other bones?

Answer 4

1. it has no medullary cavity
2. formed by membranous ossification (first bone to ossify in embryo)
3. only long bone placed horizontally

Question 5

lateral end of clavicle is _____ and has ______

Answer 5

flattened and has small oval articular facet to articulate with acromion at acromio-clavicular joint

Question 6

articulate

Answer 6

form a joint

Question 7

articular facet

Answer 7

where 2 structures meet

Question 8

medullary cavity

Answer 8

cavity where bone marrow is stored

Question 9

subcutaneous

Answer 9

under the skin

Question 10

lateral end of clavicle is also called

Answer 10

acromial end

Question 11

medial end of clavicle

Answer 11

enlarged (prismatic) and articulate with sternum at sternoclavicular joint

Question 12

medial end of clavicle is also called

Answer 12

sternal end

Question 13

lateral 1/3 of shaft VS medial 2/3 of shaft

Answer 13

lateral- convex backward to meet scapula

medial - convex forward to give passage for nerves and vessels

Question 14

lateral 1/3 features of shaft in clavicle
Anterior Border
Lower Surface

Answer 14

Flattened
Anterior Border: Deltoid Tubercle
Lower Surface: Conoid Tubercle & Trapezoid Ridge

Question 15

Conoid Tubercle

Answer 15

lyes close to posterior border. Junction of lateral third with medial two thirds of clavicle.

Question 16

Trapezoid Ridge

Answer 16

extends forward and laterally from conoid tubercle towards acromial end

Question 17

medial 2/3 of shaft of clavical
shape
lower surface

Answer 17

cylindral
lower surface has:
rough impression near sternal end that gives attachment to costo-clavicular muscle
groove in middle (longitidual) in middle third of bone for insertion of subclavius muscle
nutrient foramen (lateral)