**Question:** Joint between two bony surfaces linked by cartilage in the plane of body is called

A. Synovial joint
B. Cartilaginous joint
C. Articular joint
D. Fibrous joint

**Correct Answer:** D. Fibrous joint

**Core Concept:** Joints are anatomical structures where two or more bones meet, allowing for movement or maintaining proximity. Joints can be classified based on the type of connective tissue and degree of mobility.

**Why the Correct Answer is Right:** A fibrous joint is a joint that is stabilized by a fibrous capsule containing dense, unorganized collagen fibers. These joints have limited mobility due to the strong fibrous connections between the bones. Examples of fibrous joints include sutures (in skull bones), syndesmoses (between long bones), and gomphoses (between tooth and periodontal ligament).

**Why Each Wrong Option is Incorrect:**

A. Synovial joint: These joints have a joint cavity filled with synovial fluid and are characterized by significant mobility. Examples include knee, elbow, and shoulder joints.
B. Cartilaginous joint: Joints with articular cartilage between bones are classified as cartilaginous joints. Examples include the intervertebral discs and the growth plates. Although these joints have some mobility, they are not as restricted as fibrous joints.
C. Articular joint: This term is a broader term that includes synovial, cartilaginous, and gomphosis joints. It does not represent a specific type of joint.

**Clinical Pearl:** Understanding the different types of joints is essential for interpreting clinical findings, such as joint mobility, stability, and the presence or absence of joint space. This knowledge is useful in diagnosing joint disorders and determining appropriate treatment options.