Podcast
Questions and Answers
What type of cartilage is primarily found in the fetal skeleton?
What type of cartilage is primarily found in the fetal skeleton?
Cartilage is a vascular type of connective tissue.
Cartilage is a vascular type of connective tissue.
False
What is the function of chondroblasts in cartilage?
What is the function of chondroblasts in cartilage?
To secrete the cartilage matrix and fibers.
The primary fiber found in hyaline cartilage is __________.
The primary fiber found in hyaline cartilage is __________.
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Match the type of cartilage with its primary site of location:
Match the type of cartilage with its primary site of location:
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Which type of cartilage contains elastic fibers?
Which type of cartilage contains elastic fibers?
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Chondrocytes are the immature cartilage cells.
Chondrocytes are the immature cartilage cells.
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What is the primary component of the ground substance in cartilage?
What is the primary component of the ground substance in cartilage?
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The cartilage that provides a smooth sliding surface for joints is known as __________.
The cartilage that provides a smooth sliding surface for joints is known as __________.
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In which part of the body is white fibrocartilage commonly found?
In which part of the body is white fibrocartilage commonly found?
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Study Notes
Cartilage Overview
- Cartilage is a specialized type of connective tissue (CT)
- It lacks blood vessels (avascular)
- Its matrix is firm and resilient, like rubber
- Supports structures, maintains open airways, cushions joints, and absorbs shock
Learning Objectives
- Define cartilage
- Classify cartilage types
- Locate cartilage in the human body
- Understand cartilage microstructure
Cartilage Functions
- Support
- Maintain open airways
- Provide smooth joint surfaces
- Shock absorption (cushioning)
Cartilage Structure
- Cells: Chondrogenic cells (stem cells), chondroblasts (immature cartilage cells), and chondrocytes (mature cartilage cells)
- Fibers: Collagen and elastic fibers (composition varies by cartilage type)
- Matrix: Rubbery and basophilic (stains darkly), composed of GAGs (glycosaminoglycans), glycoproteins, and water; secreted by chondroblasts
Types of Cartilage
-
Hyaline cartilage:
- Found in fetal skeletons, articular surfaces, epiphyseal plates, ribs (costal cartilage), and respiratory passages
- Primarily composed of collagen fibers type II
-
Elastic cartilage:
- Found in the ear pinna, Eustachian tube, epiglottis, and external auditory canals
- Composed of collagen and elastic fibers
-
Fibrocartilage:
- Located in intervertebral discs, symphysis pubis, mandibular joints, sternoclavicular joints, and acetabulum
- Predominantly composed of collagen fiber type I
Hyaline Cartilage Structure
- Perichondrium: Irregular white fibrous CT, surrounds cartilage, except articular cartilage where it's absent
- Cartilage cells: Arranged in rows between collagen bundles
- Fibers: Collagen type II
- Matrix: Significant amount, basophilic, produced by chondroblasts
Elastic Cartilage Structure
- Perichondrium: Present
- Cartilage cells: Distributed throughout the cartilage
- Fibers: Collagen and elastic fibers
- Matrix: Less than in hyaline
Fibrocartilage Structure
- Perichondrium: Absent
- Cartilage cells: In rows between collagen bundles
- Fibers: Collagen type I (mainly)
- Matrix: Very scanty
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Description
This quiz covers the fundamental aspects of cartilage, a specialized type of connective tissue. You will learn about its structure, types, and functions in the human body. The quiz also explores the microstructure of cartilage and its role in providing support and cushioning.
