Types of Cartilage: Hyaline, Fibroelastic, Elastic

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Questions and Answers

Compare and contrast hyaline cartilage and fibrocartilage in terms of their structure and function. Provide a specific location in the body where each type can be found and explain how its structure contributes to its function in that location.

Hyaline cartilage has a glassy matrix with collagen and some proteoglycans, whereas fibrocartilage has thick bundles of collagen fibers. Hyaline cartilage is strong and flexible, providing smooth surfaces in joints and supporting the embryonic skeleton while fibrocartilage resists compression and limits movement. Hyaline cartilage is found at the ends of long bones in joints allowing for low friction movement, while fibrocartilage is found in the intervertebral discs, providing shock absorption and support.

If a person experiences a traumatic injury that damages the elastic cartilage in their ear, what specific changes might they notice in the function and appearance of their ear, and why?

They may notice that their ear is less flexible, sags more, and is more prone to injury. Elastic cartilage provides flexible support, so damage would compromise the ear's ability to maintain its shape and withstand bending.

Explain the roles of chondrocytes and lacunae in maintaining the health and function of cartilage. What would be the consequences if chondrocytes were unable to reside within lacunae?

Chondrocytes produce and maintain the cartilage matrix, while lacunae are spaces within the matrix where chondrocytes reside. If chondrocytes could not reside in lacunae, they would not be able to properly maintain the cartilage matrix, potentially leading to degeneration and loss of function of the cartilage.

A weightlifter injures their knee, resulting in damage to the hyaline cartilage. What symptoms might the weightlifter experience, and how does the damage to hyaline cartilage contribute to these symptoms?

<p>The weightlifter might experience pain, swelling, stiffness, and decreased range of motion in the knee. Damage to hyaline cartilage leads to friction, inflammation, and reduced shock absorption within the joint, causing these symptoms.</p> Signup and view all the answers

In the context of intervertebral discs, explain how the unique structural properties of fibrocartilage contribute to its function in this location. How does this differ from the properties and function of hyaline cartilage?

<p>The thick collagen bundles in fibrocartilage provide the intervertebral discs with the ability to withstand compression and tension, allowing for shock absorption and support of the vertebral column. Hyaline cartilage, with its smooth surface and flexibility, is better suited for reducing friction in joints rather than resisting compressive forces.</p> Signup and view all the answers

Flashcards

Hyaline Cartilage

Provides a smooth surface for joint movement; also a template for embryonic skeleton.

Fibrocartilage

Tough cartilage with thick collagen bundles; resists compression and absorbs shock.

Elastic Cartilage

Flexible cartilage with elastin fibers; provides support and bends easily.

Chondrocytes

Cells that produce and maintain the cartilage matrix.

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Lacunae

Small spaces within the cartilage matrix where chondrocytes reside.

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Study Notes

  • There are 3 types of cartilage: hyaline, fibroelastic, and elastic.

Hyaline Cartilage

  • Contains chondrocytes in the lacunae.
  • The matrix is hazy and glass-like, composed of collagen fibers and large amounts of proteoglycans.
  • Strong and flexible.
  • At movable joints it covers bones
  • Serves as a template for the embryonic skeleton before bone formation.

Fibroelastic Cartilage

  • Contains chondrocytes in lacunae that are arranged in clusters or rows.
  • It is tough due to its thick bundles of collagen fibers dispersed throughout the matrix.
  • It limits movement, prevents bone-to-bone contact, and resists compression.
  • Intervertebral discs are an example

Elastic Cartilage

  • Has a scant matrix composed of collagen, proteoglycans, and elastin fibers.
  • Supportive but bends easily.
  • Ears are an example

Chondrocytes and Lacunae

  • Chondrocyte cells produce and maintain the cartilage matrix.
  • Lacunae are the small spaces within the cartilage matrix where the chondrocytes reside.

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