- Protrusion of the center (nucleus pulposus) of an intervertebral disk into the spinal canal; ruptured or "slipped" disk

- The central mass of the disk protrudes into the spinal canal, putting pressure on the spinal nerve root

- Composed of 206 bones

----Funciton----

- Forms framework of body

- Protects vital organs

- Works with muscular system for movement

Axial Skeleton Includes:

- Skull (8 cranial bones, 14 facial)

- Spinal Column

- Ribs

- Sternum

Spinal Column Includes:

26 vertebrae divided into 5 regions:

Cervical, Thoracic, Lumbar, Sacrum, and Coccyx

Appendicular Skeleton Includes:

- Arm Bones

- Leg Bones

- Shoulder Girdle

- Pelvis (two pelvic bones; formed of three fused bones)

- Ilium (large, flared upper bone)

Skull from the left

- Coronal Suture

- Squamous Suture

- Lambdoid Suture

- Mastoid Process

- Styloid Process

- Hyoid

- Lacrimal

- Suture: immovable joint, such as joints between skull bones

- Ligament: strong band of connective tissue that joins one bone to another

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Fracture Types

- Closed: simple fracture with no open wound

- Colles: fracture of the distal end of the radius with backward displacement of the hand

- Comminuted: fracture in which the bone is splintered or crush

- Compression: fracture caused by force from both ends, as to a vertebra

- Greenstick: one side of the bone is broken and the other side is bent

- Impacted: one fragment is driven into the other

- Oblique: break occurs at an angle across the bone; usually one fragment slips by the other

- Open: fracture is associated with an open wound, or broken bone protrudes through the skin

- Pott: fracture of the distal end of the fibula with injury to the tibial joint

- Spiral: fracture is in a spiral or S shape; usually caused by twisting injuries

- Transverse: a break at right angles to the long axis of a bone