1. Objective: SWBAT will describe how bone is formed. SWBAT distinguish between male and female skeletal remains. Do Now: 1. What does this graph tell us? 2. If a victim body temperature is now 23.33 degrees Celsius, approximately how long has the victim been dead?

2. Ossification OsteoblastOsteoclast Osteocytes Layers of bone Bone Formation

3. Ossification- the process of making bones Cartilage is replaced by calcium phosphate to form bone Osteoblast- all bones originate from osteoblast Also responsible for making new bones and repairing damages Osteocytes are mature osteoblast cells that help continue bone formation Osteoclasts – eat away old bone and shape new bone

4. Ossification OsteoblastOsteoclast Osteocytes Layers of bone Bone Formation Process of making bone Add calcium phosphate to cartilage All bones originate from Make new bones and repair old ones Eat away old bone Shape new bone Mature osteoblast Continue bone formation

6. Ossification OsteoblastOsteoclast Osteocytes Layers of bone Bone Formation Process of making bone Add calcium phosphate to cartilage All bones originate from Make new bones and repair old ones Eat away old bone Shape new bone Mature osteoblast Continue bone formation 1.Compact bone 2.Spongy bone 3.Marrow

7. Different layer of bone The periosteum is a thin membrane that contains nerves and blood vessels that nourish the bone. The next layer is the compact bone(2) it is the solid hard part of the bone. Spongy bone is a mesh-like network of tiny pieces of bone. Spongy bone (3) provides support for the skeletal system (4) Marrow is a soft tissue where blood cells are made.

8. Story Time

9. Differentiating between male and female MaleFemale Skull Pelvic bone Femur male vs female

10. Eye Shape Brow Ridge Skull

11. Pelvic Bone

12. Femur

13. EXIT TICKET BRING CALC. TOMORROW 1. How can knowing the differences in the male and female skeletal system help in an investigation 2. If a victim body temperature is now 33.33 degrees Celsius, approximately how long has the victim been dead?