Chapter 6 Flashcards
- support
- storage of minerals and lipids
- blood cell production
- protection
- leverage
Five primarily functions
Includes bones of the skeleton, cartilages, ligaments, and connective tissue.
The skeletal system
Sutural bones Irregular bones Short bones Flat bones Long bones Sesamoid bones
Six bone shapes
Small, irregular bones
Sutural
Have complex shapes
Irregular bones
Small and thick
Short bones
Thin with parallel surfaces
Flat bones
Long and thin
Long bones
Small and flat
Sesamoid bones
Along bone surface
Depressions or grooves
Where tendons and ligaments attach.
At articulations with other bones.
Elevations or projections
Where blood and nerves enter bone
Tunnels
The shaft
A heavy wall of compact bone, or dense bones
A central space called medullary cavity
Diaphysis
Wide part at each end
Articulation with other bones
Mostly spongy bone
Covered with compact bone
Epiphysis
Where diaphysis and epiphysis meet
Metaphysis
Form pathways for blood vessels
Exchange nutrients and wastes
Canaliculi
Covers outer surfaces of bones
Consists of outer fibrous and inner cellular layers
Periosteum
Two-thirds of bone matrix is calcium phosphate
Reacts with calcium hydroxide
To form crystals of hydroxyapatite
Which incorporates other calcium salts and ions
Minerals
Make up 2 percent of bone mass
Bone cells (osteocytes)
- osteocytes
- Osteoblasts
- Osteoprogenitor cells
- Osteoclasts
Types of bone cells