1. BONES
How many bones in the human body?
206

2. FUNCTIONS OF BONES Muscle attachment Protect/support tissues
Blood-producing cells
(stored in liver & spleen; later in marrow)
inorganic salts
Ca, Mg, Na, K, CO3
Passage ways for nerves & blood vessels

3. TISSUES IN BONES
Bone
Cartilage
Blood
Nerve
dense connective

4. TYPES OF BONES Long: longer than wide; shaft w/2 ends
Short: cube-shaped
Sesamoid: sesame seed shape
Flat: thin, flat, slightly curved
Irregular: complex shapes

5. Typical Long Bone

6. Functions of Long Bone Features
Diaphysis: bone shaft
(compact bone)
Epiphysis: articulates w/ other
bones; forms joints
(spongy bone)
Articular cartilage: coats
epiphysis
Periosteum: surrounds & protects
bone; forms bone &
helps in repair
Epiphyseal plate: help w/
compressional forces
Medullary Cavity: hollow chamber in bone; contains marrow
Marrow: soft net-like mass of connective tissue
Red Marrow: forms RBC,
WBC, platelets, hemoglobin
Yellow Marrow: Stores fat
Endosteum: layer of cells that lines the medullary cavity
Osteon: (Haversian Canal) cylindrical unit within compact bone; contain blood vessels & nerves

7. Osteon/Haversian Canal
Allows nerves
& blood vessels
To pass