bones & cartilage

Question 1

living components in a bone

Answer 1

-bone tissue
-cartilage
-ligaments
-tendons

Question 2

functions of bones

Answer 2

1. body support
2. organ protection
3. body movement
4. mineral/fat storage
   -calcium & phosphorus
5. blood cell production
   -hematopoiesis
   -red bone marrow

Question 3

3 types of cartilage

Answer 3

-fibrocartilage
-elastic
-hyaline (most associated w bone)
→most bones start as hyaline cartilage
→growth in bone length/bone repair involve:
-making hyaline cartilage first then replacing with bone

Question 4

cartilage components

Answer 4

condroblasts: create matrix
condrocytes: maintain matrix; in lacunae
matrix: collagen fibers=strength; proteglycans= resiliency by trapping water

Question 5

perichondrium

Answer 5

double layered connective tissue; covers cartilage except at articulations

inner layer: fewer fibers; contain chondroblasts

outer layer: blood vessels and nerves penetrate it but do not enter matrix
-nutrients diffuse through matrix to reach chondrocytes

Question 6

articular cartilage

Answer 6

hyaline cartilage that covers ends of bones at joint
-has no perichondrium; is fed by synovial membrane

Question 7

types of caritiage growth

Answer 7

-appositional
-interstitial

Question 8

appositional growth

Answer 8

chondroblasts in inner layer of perichondrium add new cartilage to the outside edge of existing cartilage

Question 9

interstitial growth

Answer 9

chondroCYTES within the tissue divide and add more matrix in between the existing cells