Locomotion

What does the human endoskeleton and exoskeleton consist of consist of?

Endo-Bones, cartilage

Exo-Skin, hair, nails

What kind of connective tissue are bones and cartilage?

Supportive connective tissue

Nature of matrix of bone and the reason for the same

Hard matrix

Reason: presence of calcium salts

Nature of matrix of cartilage and the reason for the same

Pliable matrix

Reason: presence of chondroitin salts

No. of bones in the skeletal system

206

2 principle divisions of the skeletal system and the number of bones in them

Axial skeleton-80

appendicular skeleton-126

How many bones make up the human skull

22

The skull is divided into which two sets of bones

Cranial bones and Facial bones

Function of cranial bones

Form the hard protective outer covering, cranium for the brain

How many facial bones are present

14

Function of facial bones

Form the front part of the skull

What is the hyoid bone

A single U-shaped bone at the base of the buccal cavity

How many bones are present in each middle ear

3

Name the ear ossicles

Malleus, Incus, Stapes

What are ear ossicles

Three tiny bones of the middle ear

How does the skull articulate with the superior region of the vertebral column

by two occipital condyles

What is a dicondylic skull

skull with two occipital condyles

How many vertebrae form the vertebral column

26

What are the units of the vertebral column called

Vertebrae

Position of the vertebral column

dorsally placed

From where does the vertebral column extend

From the base of the skull

Main function of the vertebral column

Framework of the trunk

What is the neural canal

Central hollow portion of each vertebra

What passes through the neural canal

Spinal cord

Name the first vertebra

Atlas

Atlas articulates with which structure

Occipital condyles

Vertebral regions in order from skull

Cervical, Thoracic, Lumbar, Sacral, Coccygeal

Number of cervical vertebrae

7

Number of thoracic vertebrae

12

Number of lumbar vertebrae

5

Number of sacral vertebrae

1 (fused)