1. NEW SEATING CHART! Numbers will be drawn for your new seating chart when the bell rings. Numbers will be drawn for your new seating chart when the bell rings.

2. WARM UP 12/17 1. Write down 7 things you know about bones. 2. Write down 5 things you want to learn about bones.

3. Notes Ch 6 12/17 The skeletal system

4. Skeletal system tissues: 1. Bone 2. Cartilage (connective)

5. Functions: 1. Support – (structure for the body) 2. Protection – (bones around organs) 3. Movement – (place for muscles to attach to) 4. Mineral storage 5. Hemopoieses – makes blood cells Child – all bones Child – all bones Adult – sternum, ribs, vertebrae, illium crest Adult – sternum, ribs, vertebrae, illium crest femur, humerus femur, humerus

6. Development OSTEOGENESIS – bone formation Bones form 3 months after fertilization from the mesoderm layer (still cartilage, but shape of bones) (still cartilage, but shape of bones) OSSIFICATION – the process of cartilage changing to bone (until about 3 yrs old)

7. BONE - main parts 1. DIAPHYSIS – main long portion 2. EPIPHYSIS – the 2 ends 3. ARTICULAR CARTILAGE – thin layer of hyaline cartilage; cushions ends 4. MEDULLARY CAVITY – hollow center of bone; contains marrow 5. MARROW – liquid connective tissue that forms blood cells 6. ENDOSTEUM – membrane lining the medullary cavity

8. 7. PERIOSTEUM – * dense tissue covering bone * dense tissue covering bone * contains blood vessels that branch * contains blood vessels that branch into bone into bone * made of osteocytes – bone cells * made of osteocytes – bone cells 8. COMPACT BONE – area with tightly packed osteocytes 9. SPONGY BONE – area with loosely packed osteocytes

9. 4 types of bone 1. Long – arms, legs, hands, feet 2. Short – wrist, fingers, ankles, toes 3. Flat – ribs, skull, shoulder blade, pelvis… 4. Irregular – ear, vertebrae, jaw…

11. Long bone – has all parts Short, flat, irregular bone – only spongy, compact, periosteum, and marrow

12. LABELING 1. Epiphysis 2. Diaphysis 3. Epiphysis 4. Articular cartilage 5. Spongy bone 6. - 7. Compact bone 8.Medullary cavity 9.Endosteum 10.Marrow 11.periosteum

13. BONE MARKINGS LAB 1. FOSSA – shallow depression or indentation 2. FORAMEN – hole through a bone 3. TURBERCLE – small projection (bump); not on ends (< pea size) 4. HEAD – rounded expansion from a neck- like area 5. FISSURE – narrow slit- like opening 6. CONDYLE – round projection on the end 7. TROCHANTER – large projection; not on end (>pea size) 8. SPINUS PROCESS – sharp or pointed projection 9. CREST – raised long edge 10. FACET – smooth flat end