Fracture Repair

Question 1

osteoblasts

Answer 1

bone forming cells : they build bone

form new bones and grow and heal existing bones

Question 2

osteoclasts

Answer 2

cells that break down bone tissue : they reabsorb bone material

make space for osteoblasts to create new bone tissue in area that are growing or need repair

Question 3

Order of fracture repair

Answer 3

1. Hematoma formation
2. fibrocartilage callus formation
3. bony callus formation
4. bone remodeling

Question 4

hematoma formation

Answer 4

blood vessels that are ruptured during the break swell to form a mass
- reduces blood supply to many of the cells in the area of injury. As a result, these cells die

Question 5

fibrocartilage callus formation

Answer 5

connective tissues cells form a mass or repair called fibrocartilage callus
- callus contains some cartilage, some bone, and collagen fibers
- combined mass closes the gap between the broken bones

Question 6

bony callus formation

Answer 6

the fibrocartilage callus is gradually replaced by one made of spongy bone
- new mass is referred to as bony callus
- osteoblasts and osteoclasts move to the area and multiply

Question 7

bone remodeling

Answer 7

the callus is remodeled with the help of osteoblasts. The shape of the bones will gradually return to normal, and there will eventually be little evidence of the fracture

Question 8

what is the callus

Answer 8

the fibrous tissues and cartilage that replaces the blood clot at the fracture site