1. October 6, 2017
Journal: What organ is pictured below? What type of cut was performed on this organ?

2. Skeletal System

3. Types of Bones
Long Bones
Short Bones
Flat Bones
Irregular Bones

4. Long Bones
Longer than they are wide
Found in your arms and legs

5. Short Bones Fairly equal in width and length
Found in your wrists and ankles

6. Flat Bones
Thinner bones that can be either flat or curved, but plate-like
Examples: Skull, ribs, breastbone

7. Bone Anatomy

8. Periosteum Tough, fibrous connective tissue that covers the bone
Contains blood vessels, lymph vessels, and nerves
Acts as an anchor point for tendons and ligaments

9. Regions of the Bones
Diaphysis - The middle of the bones between the two ends
Epiphysis - the ends of the bones

10. Medullary Cavity Hollow region within the diaphysis
Storage area for bone marrow

11. Bone Marrow Yellow Marrow: high in fat content
Can be converted into red bone marrow in emergencies when massive amounts of blood are lost
Red Marrow: produces red blood cells

12. Bone Tissues
Compact bone tissue
Spongy bone tissue

13. Compact Bone Tissue Dense, hard tissue
Composes the stem of long bones and the outer layer of other bones

14. Compact Bone Tissue Parts
Osteons (Haversian Systems) - have mature bone cells (osteocytes) that form concentric circles around blood vessels
Run parallel to each other so enough oxygen and nutrients can get to the bone cells
Protein fibers, calcium and other minerals fill the area around the osteocytes

15. Spongy Bone Tissue Made up of trabeculae
An irregular arrangement holes between tissues give it a spongy look

16. Spongy Bone Tissue Parts
Endosteum: connective tissue similar to periosteum lines the spongy tissue
Helps make bones weigh less
Provides space for red bone marrow