1. 33.1 Skeletal System KEY CONCEPT The skeletal system includes bones and tissues that are important for supporting, protecting, and moving your body.

2. 33.1 Skeletal System Open books to page 1000. Complete the handout 33.1 Turn in Friday’s handout!

3. 33.1 Skeletal System Your skeletal system is made up of the appendicular and axial skeletons. The skeletal system protects, supports, and moves the body.

4. 33.1 Skeletal System The appendicular skeleton includes legs, arms, feet and hands. –allows for movement –includes bones called girdles that connect limbs to body

5. 33.1 Skeletal System The axial skeleton includes the skull, rib cage, and spinal column. skull rib breastbone vertebra –supports body and protects tissues –allows for limited movement

6. 33.1 Skeletal System –cushions bones –allows for smooth movement –connect two bones Cartilage is connective tissue between bones. cartilage

7. 33.1 Skeletal System Bones connect to form joints. Joints are places were two bones meet. There are three types of joints. –fibrous, which does not allow for movement fibrous joint

8. 33.1 Skeletal System Bones connect to form joints. Joints are places were two bones meet. There are three types of joints. cartillage –cartilaginous, which allows partial movement

9. 33.1 Skeletal System Bones connect to form joints. –synovial, which allows for greater movement Joints are places were two bones meet. There are three types of joints.

10. 33.1 Skeletal System Ligaments are long bands of tissue that connect bones across a joint. ligament

11. 33.1 Skeletal System There are several types of synovial joints. –gliding –pivot –ball-and-socket –saddle –hinge GLIDING JOINT PIVOT JOINT BALL-AND-SOCKET JOINT SADDLE JOINT HINGE JOINT

12. 33.1 Skeletal System Bones are living tissue. Bone is made of compact bone tissue and spongy bone tissue. Compact bone Spongy bone

13. 33.1 Skeletal System Compact bone is hard and dense. –Osteocytes (bone cells) maintain compact bone rings. –Haversian canals allow blood vessels in the bone. osteocytes blood vessel Haversian canals

14. 33.1 Skeletal System Spongy bone protects red or yellow bone marrow. –Red bone marrow produces blood cells. –Yellow bone marrow is mostly fat. Periosteum A layer of connective tissue that covers bone Red bone marrow

15. 33.1 Skeletal System Calcification is the process of building hard bone. –combines collagen and calcium phosphate –transforms cartilage into hard bone during childhood osteocyte compact bone

16. 18.2 Viral Structure and Reproduction

17. 33.1 Skeletal System