Skeleton

Question 1

How many bones are present in human skeleton?

Answer 1

It is made of 206 bones

Question 2

Write 2 main divisions of skeleton?

Answer 2

There are 2 main divisions of skeleton
.Axial skeleton(80 bones)
. Appendicular skeleton (126 bones)

Question 3

What does axial skeleton includes?

Answer 3

Axial skeleton includes
.skull
. vertebral column
.rib cage

Question 4

Write bones of skull?

Answer 4

Skull consists of 29 bones which are divided into
.cranial bones
.facial bones
.ear ossicles
.hyoid

Question 5

Name cranial bones?

Answer 5

Cranium consists of 8 bones
4 unpaired
2 paired
Parietal and temporal are paired bones while frontal, occipital,sphenoid and ethmiod are unpaired bones

Question 6

Name facial bones?

Answer 6

There are 14 facial bones of which 6 are paired and 2 unpaired .maxilla , zygomatic,nasal,lacrimal, palatine and inferior concha are paired bones .mandible and vomer are unpaired bones

Question 7

Name facial bones?

Answer 7

There are 14 facial bones of which 6 are paired and 2 unpaired .maxilla , zygomatic,nasal,lacrimal, palatine and inferior concha are paired bones .mandible and vomer are unpaired bones

Question 8

Name of bones of ear?

Answer 8

There are 6 ear ossicles in pairs
.mallus
.Incus
. stapes

Question 9

What is hyoid bone?

Answer 9

Lies at bottom of skull
Do not articulate with any other bone of skull

Question 10

Wdy know abt vertebral column?

Answer 10

Vertebral column consists of 33 vertebrae which extends from skull to pelvis .
Protect spinal cord
Has 4 carvatures
33 vertebrae are
Cervical (7) lie in neck region atlas is first cervical vertebrae and axis is the second
Thoracic (12) lie in chest region
Lumbar 5 lie in abdominal region
Pelvic 9 scrum is formed by fusion of anterior 5 vertebrae while coccyx is formed by fusion of 4 posterior vertebrae

Question 11

Write about rib cage ?

Answer 11

Rib cage consists of 12 pairs of ribs
7 pairs attach directly with sternum
8,9,10th pair attach through costal cartilage with the sternum they are called false ribs
11,12th pair of ribs are called floating ribs because they don not attach directly with sternum

Question 12

Write about pectoral girdle?

Answer 12

Pectoral girdle consists of pair of clavicle and a pair of scapula
Clavicle connect scapula with sternum

Question 13

Write abt fore limb?

Answer 13

Forelimb consists of humerus,radius ,ulna , carpel,meta carpel and phalanges
Humerus is a long bone the end of which fits into glenoid cavity
Radius is outer bone of forearm and ulna is a long inner arm
8 carpels per wrists
5 metacarpels which make palm
14 phalanges 3 in each finger while 2 in thumb

Question 14

Pelvic girdle?

Answer 14

It is composed of 2 coxal bones .each coxal bone is formed by fusion of 3 bones ilium,ischium and pubis
The two halves of bone join at pubic symphysis
Femur is thigh bone the end of which fits into acetabulum
Tibia is long outer bone and fibula is inner bone
7 tarsal per leg
5 metatarsals
14 phalanges