The four function of bones is given below :

  • The bones protect the inner vital organs like; heart, spinal cord, brain, lungs etc whereas lungs and heart are protected by ribs, the spinal cord is protected by the backbone and skull protects our brain.
  • The bone marrow in the long bones helps in the production of red blood cells (RBCs). It helps to transport oxygen.
  • The major functions of the bone are to provide a skeleton and shape to the body Because of bones we are able to stand.
  • In the movement of body bones and muscles plays an important role. Due to this joined bones help to move in different directions for their smooth functioning.

The types on the basis of bone are:

Long Bones- In our body, there are limited long bones. The hands and legs are located as long bones.

Short Bones-We knows that human has 206 bones in our body. It also has many short bones in our body which are located different parts of the body.

Flat-Such bones protect the internal organs of our body and they are flat in structure. It provides a skeleton and gives shape to the body.

Irregular Bones-The internal organs protect the irregular bones. Such bones do not have definite shape or size. These bones are attached together by immovable joints.

 

             

 

 

The joint which allows free movements in fixed path depending on the type of joints is known as movable joints.It is also called synovial joints as they contain synovial liquid in the membrane. There are five types of movable joints.Such types of movable joints are :

  1. Hinge Joint
  2. Saddle Joint
  3. Gliding Joint
  4. Pivot Joint
  5. Ball and Socket joint

The joint which allows free movements in fixed path depending on the type of joints is known as movable joints.It is also called synovial joints as they contain synovial liquid in the membrane. There are five types of movable joints.Such types of movable joints are :

Pivot Joint: The joint which is formed in such a way whose one bone rests on the other and the first moves freely around the other. The skull rotating around the upper end of the vertebral column is the best example of the pivot joint. Radius and Ulna are the examples of pivot joint.

Saddle Joint: The joint whose one piece of bone can slide with the other bone resting on it . Such joints which found the bones of palms and feet.

Hinge Joint:The joint in which the bones can move to and for like a door which opens only one way is known as a hinge joint. Elbo, ankle, knee etc are the hinge joints.It also prevents the movement in opposite direction.

Gliding Joint: The joints which move above each other by gliding or sliding is known as gliding joint. The example of gliding joints is the wrist and ankle. Gliding joints are flexible to stretch, move and compress.

Ball and socket joint: A joint is formed from two bones where an end part of a bone is in the shape of a ball and the hollow of another bone is called ball and socket joint. The bone which end is like a ball is fit inside the socket of the another bone it freely moves around in 360o.