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Questions and Answers
What is the main reason that elastic cartilage appears more opaque and yellow than hyaline cartilage?
What is the main reason that elastic cartilage appears more opaque and yellow than hyaline cartilage?
- It is surrounded by blood vessels and lymphatics
- It contains more ground substance
- It has a dense network of elastic fibers (correct)
- It has a higher concentration of chondrocytes
Which of the following is a characteristic of elastic cartilage that sets it apart from other cartilage types?
Which of the following is a characteristic of elastic cartilage that sets it apart from other cartilage types?
- It contains a high amount of type I collagen fibers
- It has a dense network of elastic fibers and high flexibility (correct)
- It is not enveloped by a perichondrium
- It undergoes calcification with age
Which of the following structures contain elastic cartilage?
Which of the following structures contain elastic cartilage?
- The nasal septum
- The vertebral column
- The external ear (correct)
- The knee joint
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Study Notes
- Elastic cartilage is more opaque and yellow than hyaline cartilage due to abundant elastic fibers.
- It is resilient and has more flexibility and elasticity than other cartilage types.
- The matrix contains a dense network of elastic fibers and a small amount of ground substance.
- Chondrocytes in elastic cartilage are closely packed and often found singly in lacunae.
- Type I collagen fibers are present but masked by ground substance and intermingle with elastic fibers.
- Elastic cartilage is enveloped by a perichondrium and does not have blood vessels or lymphatics in the cartilage interior.
- It undergoes appositional growth from the perichondrium or interstitial growth by chondrocyte mitosis.
- Elastic cartilage does not calcify with age.
- Elastic cartilage is found in the external ear, epiglottis, and larynx.
- Elastic cartilage is important for maintaining shape and function in these structures.
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