**Question:** White fibrocartilage is present in all EXCEPT:

A. Articular cartilage
B. Dura mater
C. Coronary arteries
D. Vertebral discs

**Core Concept:** White fibrocartilage is a type of cartilage characterized by a dense, white appearance due to the high collagen content and low water content. It provides strong, rigid support and maintains the shape of various structures.

**Why the Correct Answer is Right:** White fibrocartilage is primarily found in locations requiring strong, rigid support due to its high collagen content and low water content. It is responsible for maintaining the shape and providing structural stability.

**Why Each Wrong Option is Incorrect:**

A. Articular cartilage: White fibrocartilage is not found in articular cartilage as it lacks the strong support needed in the smooth, low-friction surface required for joint movement.

B. Dura mater: While dura mater is a fibrous connective tissue, it is composed of yellow elastic fibers rather than white fibrocartilage, which is not suitable for providing the necessary support and flexibility for the protective covering of the brain and spinal cord.

C. Coronary arteries: White fibrocartilage is not found in the tunica media of coronary arteries, as this layer primarily consists of smooth muscle cells and elastic fibers, which provide the necessary elasticity for blood vessel function and not rigid support.

D. Vertebral discs: While white fibrocartilage is found in the vertebral bodies and endplates, it is not present in the inner nucleus pulposus of the intervertebral discs. The nucleus pulposus is composed of a gelatinous, proteoglycan-rich gel, providing the required flexibility for disc movement between vertebrae.

**Clinical Pearl:** Understanding the specific tissue types in various connective tissue compartments is essential for understanding tissue function, pathology, and clinical manifestations. Knowledge of the correct location of white fibrocartilage and its specific functions allows for accurate identification of abnormalities in these tissues during clinical examination and diagnosis.