Step 1: Understanding the Question:
The question asks to identify the specific anatomical structure where white fibrous cartilage is located in the human body.
Step 2: Key Concepts and Approach:
Cartilage is a specialized, semi-rigid connective tissue. It is classified into three main types based on its extracellular matrix composition:
1. Hyaline cartilage (most common, containing fine collagen fibers).
2. Elastic cartilage (rich in elastic fibers, highly flexible).
3. Fibrous cartilage (dense regular arrangement of thick collagen type I fibers, highly resistant to pull and compression).
Step 3: Detailed Explanation:
• Fibrous Cartilage (Fibrocartilage): This is the strongest type of cartilage due to dense rows of thick, parallel collagen fibers.
It acts as a shock absorber in areas subject to high pressure and physical stress.
It is found in the intervertebral discs and the pubic symphysis (the joint connecting the left and right pubic bones). Thus, this is the correct choice.
• Hyaline Cartilage: This is found in the larynx, tracheal rings, and articular surfaces of joints.
• Elastic Cartilage: This is found in the epiglottis, pinna of the external ear, and Eustachian tubes.
Step 4: Final Answer:
Fibrous cartilage is found in the pubic symphysis.