Skeletal System 1

Question 1

Classification of bones

Answer 1

1. Position:axial and appendicular
2. Shape:
3. Ossification: endochondral and intramembranous

Question 2

Exception of bones made by endochondral ossification

Answer 2

Bones of cranium of skull
Clavicle

Question 3

2 divisions of the brain bones

Answer 3

1. Neurocranium: encloses the brain (8)
2. Viscerocranium: encloses digestive and respiratory organs (14 facial bones)

Question 4

Divisions of temporal bone

Answer 4

1.Tympanic- external acoustic meatus and styloid process
2. Squamous- mandibular fossa and zygomatic arch
3. Petrous- within cranial fossa
4. Mastoid

Question 5

A saddle shaped depression in the midline of the sphenoid at the skull base

Answer 5

Sella turcica

Question 6

Atypical vertebrae

Answer 6

C1,2&7
T1,9-12
L5

Question 7

Scapula
3 boarders, 3 angles, 3 regions

Answer 7

1- superior, lateral, medial
2- superior, inferior, lateral( supraglenoid tubercle of scapula)
3- anterior: subscapular fossa
- posterior: supraspinatus, spinous process, infraspunatus

Question 8

Processes of scapula

Answer 8

Acromion- bends forward
Spinous-posteriorly
Coracoid-bent finger

Question 9

Carpals

Answer 9

Scaphoid
Lunate
Triquetrum
Pisiform
Trapezium
Trapezoid
Capitate
Hamate

Question 10

Proximal end of humerus

Answer 10

-2/3 sphere facing medially, posterioly, superiorly
-Head covered by cartilage
-Anatomical and surgical neck

Question 11

Distal end of humerus

Answer 11

Smooth articular surfaces (epicondyles)
Medial ( trochlea )
Lateral ( capitulum)

-trochlea articulates with ulna
-capitulum articulates with radius

Question 12

Fossae on distal end of humerus

Answer 12

1. Coronoid (anterior)
2. Olecranon (posterior)

Question 13

Ulna proximal and distal end

Answer 13

Proximal end- c shaped, trochlear notch, coronoid process, radial notch,supinator fossa, olecranon (elbow prominence)

Distal end- head,crescent shaped, 2 articular surfaces (radius and triquetrum)
Styloid process inferiorly

Question 14

Radius articulations

Answer 14

Articulates with scaphoid and lunate

Question 15

Radius proximal end and articulations

Answer 15

2 articular surfaces: capitulum and ulna
Tuberosity of radius

Question 16

Distal end of radius

Answer 16

Wide
Articulation with scaphoid and lunate
Convex and grooved dorsally
Concave and smooth ventrally

Question 17

Pelvic girdle

Answer 17

1. Os coxa (hip bone)
2. Sacrum
3. Coccyx

Question 18

Os coxa articulations

Answer 18

1. Ileum (laterally)
2. Ischium (posteriorly)
3. Pubis (anteriorly)

Question 19

Os coxa boarders

Answer 19

1. Anterior- ASIS and AIIS
2. Posterior-Same
3. Superior- illiac crest