detail description about skeletal system ?

Asked by 744069045942976 | 5th Oct, 2018, 10:37: PM

Expert Answer:

Skeletal system includes bones, cartilage and joints.

Functions of the skeletal system: Support and shape, protection, movement, leverage, formation of blood cells and storehouse for minerals.

COMPONENT OF THE SKELETON

DESCRIPTION

Skull

 

Divided into head bones and facial bones.

Head bones-8, Facial bones- 14

Vertebral column 

 

Composed of 26 ring-like bones called vertebrae.

Has a characteristic S-shaped curve which helps in balancing the body.

Cervical vertebrae- 7 bones, Thoracic vertebrae- 12 bones, Lumbar vertebrae- 5 bones, Sacrum- 5 bones, Coccyx- 4 bones

Ribs

 

Each rib articulates with a thoracic vertebra.

True ribs- 7 pairs, False ribs- 3 pairs, Floating ribs- 2 pairs

Sternum

 

Long, flat and strong bone in the centre of the chest. Holds the ribs in place.

Bones of the limbs

 

Upper arm bone- Humerus, Forearm bones- Radius and Ulna

Hand- 8 carpals, 5 metacarpals, 14 phalanges

Leg bone- Femur, Bones of lower limb- inner Tibia and outer Fibula, Knee bone- Patella

Foot- 8 tarsals, 5 metatarsals, 14 phalanges

Bones of the girdles

 

Each pectoral girdle consists of a collar bone or clavicle and the shoulder blade or scapula.

Pelvic girdle- Ilium, Ischium and Pubis

Cartilage is a connective tissue with a solid matrix and widely spaced cells found between two or more bones. It smoothens the bone surface, acts like a cushion and prevents rubbing of bones against each other.

The point at which two separate bones meet is called a joint.

Answered by Sheetal Kolte | 8th Oct, 2018, 12:12: PM