Joints of the Body
Have you ever wondered how many joints you have in your body? Or maybe you have always wondered how they work to facilitate movement. Did you know your body has a total of 360 joints. You body has 206 bones. At every point where these bones intersect there is a joint.
A joint is defined as the point of contact between two or more bones. This point of contact provide mechanical support for the human body. All joints in your body are classified in four categories. This classification can be based on two factors;
Function: This is the role played by a joint in terms of possible movement.
Structure: This refers to how bones are attached to each.
The major joints categories in the body are pivot joints, hinge joints, saddle joints, and ball and socket joints. All of them facilitate free movement without bones knocking each other.
The major joints categories in the body are:
- pivot joints,
- hinge joints,
- saddle joints,
- and ball and socket joints.
They facilitate free movement without bones knocking each other.
Ball and Socket
This joint is formed in places where one bone has a ball-shaped or a rounded surface that fits into a cup-shaped or concave depression found on the other bone. This contact between bones with such structures forms a synovial joint. It can allow a movement of 360 degrees. Joints on the hip region are examples of a ball and socket joint where the femur bone fits into the pelvis cavity.
Hinge joints operate the way a door does. It allows a single plane movement just like closing and opening a door. Strong ligaments connect the bones and aid in movement. Examples of hinge joints are the knee, between fingers, and the elbow.
This joint is formed when one two bones meet with one having a bony cylinder and the other having a ring-like structure. Movement of this joint is usually a half circle and it occurs when one bone rotates around another. One example of this type of joint is where the first spine vertebra joins the skull to the second spine vertebra. This joint facilitates rotation of the head.
This joint is formed when bony surfaces holding a synovial joint are slightly rounded or flat. This joint facilitates a wide array of movement between bones as one bone slides past the other allowing free movement. Examples of sliding joints are the points of intersection between the small eight bones of the wrist and of the spine vertebrae.
Just like other parts of the body, joints have disorders as well. Joints can sustain injuries through activities, accidents and diseases. Some joint disorders can be severe and may deeply impair your movements.
The most common degenerative joint diseases in the human body are:
- and osteoporosis.
It is important that you seek medical attention whenever you experience joint pain or suffer injuries that cause pain in any of your joints.
For more information and Ful Diagrams on joints please check this out.