Question

explain different parts of human skeleton only for class 5​

Answer 1

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The skeleton is a framework of bones that provides protection, gives the body proper shape, and helps in the movement. The human skeleton is divided into the axial skeleton and the appendicular skeleton. The axial skeleton includes the vertebral column, the rib cage, the skull and other associated bones.

Answer 2

Answer:

Bones are composed of calcium, phosphorus, and a fibrous substance known as collagen. Bones are strong but light in weight as they are hollow from inside. The long bones of the arms and legs, such as the femur (thigh bone), have a central cavity containing bone marrow. Bone marrow is the flexible tissue in the interior of bones. In humans, red blood cells are produced by bone marrow.

Parts of skeletal system

The Skull

The skull is the most complicated bony structure that forms the head of the skeleton. It provides a protective case for the brain and supports the structures of the face. The skull is composed of two parts: the cranium and the mandible.

Rib Cage

The ribs are delicate bones that enclose and protect the chest cavity, where organ such as heart and lungs are located. The human rib cage is made up of 12 paired rib bones; each are symmetrically paired on a right and left side, forming a cage. The last 2 lowest pairs of ribs are only attached to the spine at the back. Hence they are called the floating ribs.

Immovable joints

An immovable joint or fixed joint is a place in the body where two bones are joined together but show very little or no movement. This includes joints between the bones of the skull, joints in the pelvis and joints between the teeth and the mandible, or lower jaw, and the maxilla, or upper jaw.

Movable joints

The joints that provide free movement to the body are called movable joints. This type of bones is found in the arms, leg, hip and shoulder. Cartilage is found within all movable joints which make movements easier.

There are different types of movable joints in the body:

Hinge joint: This type of joint moves only in one direction like a hinge of a door. Joints in elbows, knees, fingers and toes have hinge joints.

Ball and Socket joint: This type of joint allows movement in all direction and found in hip and shoulders.

Pivot joint: This type of joint is found between our head and neck and allows side to side movement.

Gliding Joint: Gliding joints allow the bones to glide past one another in any direction along the plane of the joint – up and down, left and right, and diagonally. This type of joint is found in wrist and ankle.