There are actually six different types of joints:
* Hinge * Pivot * Saddle * Ellipsoidal * Ball and socket * Gliding
the joint is ghago
Hinge and saddle
All joints except immovable joints allow bones to move.
There are joints that move back and forth ( elbow ) and other joints that move in a circle ( hip, ankle, shoulder. )
Two kinds of moveable joints are hinge joints and ball-and-socket joints. Hinge joints, like those in the elbows and knees, allow movement in one direction, similar to a door opening and closing. Ball-and-socket joints, such as the shoulder and hip joints, enable a greater range of motion, allowing movement in multiple directions.
That is 'definition' .
definitoin? really? ---well, the definition is: when an atom attacks the world in order to save itself. A solution.
A big house
joints
the muscles between bones
the muscles between bones
it means death