Lecture 13 Bone and Cartilage

Question 1

What are the three types of cartilage?

Answer 1

• Hyaline cartilage
• Elastic cartilage
• Fibrocartilage

Question 2

Chondroblast function?

Answer 2

Lay down cartilage matrix and become chondrocytes

Question 3

Chondrocytes function?

Answer 3

Maintain cartilage matrix

Question 4

Cartilage functions?

Answer 4

• Compressible
• Resists distortion
• Absorbs shock
• Reduce friction
• both bone growth and bone fracture repair

Question 5

What is the lacunae?

Answer 5

• “Holes”

- Pockets within the matrix where the chondroblasts and chondrocytes are found

Question 6

Is cartilage avascular or vascular and what does that imply?

Answer 6

Avascular

• Slow to heal
• Nutrients and oxygen are derived from blood vessels that surround the cartilage and must diffuse through the matrix to the cell

Question 7

What are the layers of the Perichondrium? What are its components?

Answer 7

1. Outer fibrous layer
   - Contains fibroblasts - can differentiate into chondroblasts
2. Inner chondrogenic layer
   - Gives rise to chondroblasts (which become chondrocytes)
   - The chondrocyte is involved in the reduction of the collagen and proteoglycans in the matrix