Question

Cartilaginous joint is a joint between

• A. ( \text{Skull bones} ) \
• B. ( \text{Vertebrae} ) \
• C. ( \text{Phalanges} ) \
• D. ( \text{Elbow} ) \

Hint:

Remember the three main structural classifications of joints: fibrous, cartilaginous, and synovial. Think of examples for each to solidify the concept: skull sutures (fibrous, immovable), intervertebral discs (cartilaginous, slightly movable), and knee/elbow joints (synovial, freely movable).

Answer 1

The Correct Option is B

Joints in the human body are classified based on the type of tissue that binds the bones together.

• Fibrous Joints: Bones are joined by fibrous connective tissue. These joints are typically immovable or slightly movable. An example includes the sutures between skull bones.
• Cartilaginous Joints: Bones are joined by cartilage. These joints allow for limited movement. There are two types:
  • Synchondroses: Bones are joined by hyaline cartilage. Examples include the epiphyseal plates in growing bones or the joint between the first rib and the sternum.
  • Symphyses: Bones are joined by fibrocartilage. A prominent example is the intervertebral discs between the vertebrae, which provide flexibility and absorb shock. The pubic symphysis is another example.
• Synovial Joints: These are the most common type of joint, characterized by a joint cavity filled with synovial fluid, allowing for a wide range of motion. Examples include the joints of the phalanges (fingers/toes) and the elbow joint.

Given the options:

• (A) Skull bones are connected by sutures, which are fibrous joints.
• (B) Vertebrae are connected by intervertebral discs, which are symphyses (a type of cartilaginous joint).
• (C) Phalanges contain synovial joints (e.g., hinge joints between phalanges).
• (D) The elbow is a synovial hinge joint.

Therefore, the joint between vertebrae is a cartilaginous joint.