HUMAN SKELETON

HUMAN SKELETON

• The bony framework in our body is called a skeleton.
• Adult human skeleton is made up of 206 bones.
• The four main parts are:-
• The skull, backbone, rib cage and the limbs
• Bones consist of a soft and spongy layer called a bone marrow

FUNCTIONS OF SKELETON

• Supports and gives form to the body.
• Protects internal organs.
• Aids body movements.
• Makes blood cells.

SKULL

• Bony structure which protects the Brain
• The upper part is made up of 8 flat bones
• The face and jaw contains 14 bones
• The lower jaw is only movable bone
• The lower jaw enables to chew food and talk

THE BACKBONE OR SPINE

• Ring like bones run from skull to pelvis
• Provides poster while allowing movement and flexibility
• Protects the spinal cord
• Supports the upper body weight
• Made of 33 irregular shaped bones called vertebrae

THE RIB CAGE

• Long,curved individual bones with joints to the spinal vertebrae .
• Protects the chest cavity , where important organs reside.
• Allows some movement which helps to stabilize the chest during inhaling and exhaling.
• Made of 24 bones; each symmetrically paired on right and left side.

HUMAN LIMBS

• Each arm is attached to a shoulder blade.
• Wrist , arm and all fingers add up to 54 bones.
• Attached to the pelvis.
• The bone that goes through the pelvis and the knee is called the femur .
• The femur is the longest bone of the body.

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