Bab 2 Skeletal system

Axial and appendicular skeleton

Axial skeleton : upright part (head, thorax, trunk(vertebra)) (80bones)
Appendicular : attach to axial skeleton (126)

sacrum, coccyx, and hip bones are several bones fused together

in hip Fused bone known as (ilium, ischium, and pubis)

Compact bone, Cancellous bone

Compact bone (Hard)
cancellous bone (spongy (Trabecula arrange in pattern to resist stress and strains)
Trabeculla filled with bone marrow —> bone lighter

Diaphysis

Made up compact bone, centre is medullary cannal (hollow, contain bone marrow), Endosteum lining the medullary cannal contain osteoclast for bone resorption, periosteum membrane that cover all the bone except articular(joint) cover by hyaline cartilage, periosteum contain BV and nerve—> promoting growth in Diameter,immature bone and repairing bone

two type epiphyses

Traction and pressure
common condition at the traction epiphysis of the tibial tuberosity in children whose bones are still growing is called Osgood-Schlatter disease