Skeletal System Flashcards
Give ex of each of the five bones
- Long- femur
- Short- tarsal
- Flat- parietal
- Irregular- vertebra
- Sesamoid (round)- patella
Five types of bone
- Long
- Short
- Flat
- Irregular
- Sesamoid
Glycosaminolgycans (gags)
Organic matter in bone
Hydroxyapatite
Only found in bone!!
Inorganic; mineral
Relationship btwn skeleton and calcium
Skeleton is reservoir of calcium, it stores extra
Lamellae
Layers
Concentric circles
Rings start out small and get larger toward outside
What kind of tissue is bone
CT
Epiphyseal plate
Hyaline cartilage; where your bone grew from as you grew; forms a model for bone to replace
Osteogenic cells
Will eventually give rise to bone
Osteon
Basic stuctural unit of compact bone
Does periosteum rot
Yes over time
Medullary cavity
Cavity inside bone
Bone salts are located ?
In the matrix
What are 2 bone salts and what do they do
Calcium carbonate and hydroxyapatite (unique to bone!!!)
Make bone hard
2 diff btwn bone and cartilage
Bone has concentric rings
Cartilage has chondroblasts, bones has osteoblasts (both sit in lacunae)
Is bone vascular?
Yes
What is in the middle of each osteon?
Central canal (Haversion)
Another name for central canal
Haversion canal
What tissue are the rings in osteon
CT
Where are osteocytes located?
In lacunae in between concentric circles
Perforating (volkmann’s) canal
Enter bone from outside and inside feeding into Haversian systems carrying nerves and blood vessels
Sharpey’s fibers
Keep periosteum so strong and from peeling off; anchor it
Where is red marrow
Spongy bone
Canaliculi
Canals btwn lacunae of ossified bone; osteocytes project into them
What kind of marrow is in the medullary cavity?
Yellow marrow
How many vertebrae are there?
33
How many cervical vertebrae are there and what are the first 2 specifically called?
7
Atlas
Axis
How many thoracic vertebrae are there
12
How many lumbar vertebrae are there
5
How many sacrum vertebrae are there
5 (fused)
How many coccyx are there?
4 (fused)
Articulate
Put together; where they meet
Facet
Face
Process
Projection or outgrowth of tissue from after body
Tubercle
Nodule/small eminence, especially one on a bone for attachment of a tendon
What percent of our skeletal system being broken down and remade in one year?
25%
Smallest bones in the body
3 ear bones
Hyoid bone
Floating bone; only bone not connected to anything
What kind of cartilage is the articular cartilage at the ends of long bones (epiphysis)?
Hyaline
What kind of cartilage is in the ribs?
Costal (fibrocartilage)
Another name for the body of vertebrae
Centrum
What are four main functions of bone?
Support/protection, body movement, inorganic salt storage, and blood cell formation
Hint: SIP ‘double’ B
How many bones are in the adult
206
How many bones in newborn
270
Axial skeleton consists of:
skull, middle-ear bones, hyoid, rib cage, vertebral column, and sternum
Appendicular skeleton consists of:
upper/lower extremities, and the pectoral and pelvic girdles
Diaphysis
shaft of long bone