Elastic Cartilage · Histology

The flexibility of the external ear is primarily due to the presence of:

  1. Type I collagen fibers
  2. Aggrecan and hyaluronic acid in the matrix
  3. Elastic fibers in the elastic cartilage
  4. Adipose tissue in the dermis
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Correct answer: Elastic fibers in the elastic cartilage

While proteoglycans like aggrecan provide compression resistance, the ability of the ear to be folded and return to its original shape is a direct result of the elastic fibers in the underlying cartilage.

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