Bones

Bones

1. Long bones

   • Shafts and two ends
   • Outer layer of compact bone
   • cavity containing bone marrow
   • Two ends made of cancellous bone
   • E.g. Femur, humerus, ulna, tibia

2. Flat bones

   • flat in shape
   • two layers of compact bone, layer of spongy bone inbetween
   • e.g. scapula, pelvic bone, skull bones
   • Strong!

3. Irregular bones

   • Same structure as flat bones
   • Irregular shape
   • e.g. carpal and tarsal bones. Vertebrae

4. Sesamoid bones

   • Small bones developed within tendons
   • Assist with movement of joins
   • e.g. patella and fabella

5. Pneumatic bones

   • Bones that contain air
   • e.g. sinuses
   • Birds have lots