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=== Main Groups === | === Main Groups === | ||
[[Image:Vertebral column.png|250px|thumb|right|Human vertebral column]] | [[Image:Vertebral column.png|250px|thumb|right|Human vertebral column]] | ||
Bones can be grouped in two divisions: axial skeleton and appendicular skeleton. The axial skeleton forms the vertical axis of the body. They include the bones of the head, vertebral column, ribs and breastbone or sternum. The appendicular skeleton includes the free appendages and their attachments to the axial skeleton. The free appendages are the upper and lower extremities, or limbs, and their attachments which are called girdles.[http://training.seer.cancer.gov/module_anatomy/unit3_5_skeleton_divisions.html] | |||
=== Joints === | === Joints === | ||
There are four different primary joints located throughout the body. These are the hinge, the ball and socket, the picot, and the glide joints. The each serve different purposes, and are located in areas best suited for those purposes. | There are four different primary joints located throughout the body. These are the hinge, the ball and socket, the picot, and the glide joints. The each serve different purposes, and are located in areas best suited for those purposes. |