* Joint is connection of bones or interbones connection
· ** Joint can be separated into 3 kinds: rigid (synarthosis), amphiarthosis, and movement joint (diarthosis)
1. Rigid joint : i.e bones that form skull
2. Amphiarthosis : i.e connection between ribs and sternum; connection of hand carpi bones (tulang2 pergelangan tangan) and leg wrist talus (tulang2 pergelangan kaki)
3. Movement joint (diarthrosis) : ball and socket joint (peluru), hinge joint (engsel), pivot joint (putar), n saddle joint (pelana).
a. Ball and socket joint (peluru) : can be done to every direction. i.e shoulder wrist.
b. Hinge joint (engsel) : only to one direction. i.e elbow and knee.
c. Pivot joint (putar) : its movement is rotation. i.e atlas bone in skull bone to rotator bone so head can move in rotation.
d. Saddle joint (pelana) : its movement is two direction. i.e the tip of bone between hand thumb and hand palm bone.
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