Overview
This lecture focuses on identifying the distinguishing features of elastic cartilage under a microscope and comparing it to other types of cartilage.
Identifying Elastic Cartilage
- Elastic cartilage appears densely packed with cells (chondrocytes) at 100X magnification.
- Chondrocytes are found within small cavities called lacunae.
- Lacunae surround and contain individual chondrocytes, preventing them from moving.
- The presence of visible elastic fibers in the matrix is the key distinguishing feature of elastic cartilage.
Comparing Cartilage Types
- In hyaline cartilage, the matrix looks solid and misty with no visible fibers.
- In fibrocartilage, cells are more spaced apart and arranged in an elongated pattern.
- Only elastic cartilage shows clearly visible elastic fibers within the matrix.
Key Terms & Definitions
- Elastic Cartilage â a type of cartilage distinguished by visible elastic fibers in the matrix.
- Chondrocyte â a cartilage cell found within lacunae.
- Lacunae â small cavities in cartilage that house chondrocytes.
- Matrix â the intercellular substance surrounding chondrocytes; contains fibers and ground substance.
- Elastic Fibers â threadlike structures in elastic cartilage's matrix that provide flexibility and resilience.
Action Items / Next Steps
- Review microscope slides of elastic, hyaline, and fibrocartilage to practice distinguishing features.
- Memorize the key identifiers for each type of cartilage.