What substance covers the ends of bones and is found between vertebrae?

What substance covers the ends of bones and is found between vertebrae?

• A. Bursa
• B. Cartilage
• C. Synovial fluid
• D. Ligament

Answer: (B)

The correct choice is cartilage. This flexible connective tissue is essential in reducing friction and allowing smooth movement at joint surfaces, as well as serving as a cushion between the ends of bones. In the spine, cartilage is specifically located between the vertebrae, where it forms intervertebral discs that provide support and help absorb shock during movement. The presence of cartilage in these areas enhances mobility and helps prevent bone-on-bone contact, which can lead to pain and injury. The other options refer to structures that serve different functions. Bursa, for instance, is a small fluid-filled sac that acts as a cushion between bones and other moving structures, but it does not cover bone ends or exist specifically between vertebrae. Synovial fluid is the lubricating liquid found within synovial cavities, aiding in the movement of joints, but it is not a substance that directly covers bone ends. Ligaments are tough bands of tissue that connect bones to other bones at joints but do not provide cushioning between the ends of bones. Understanding these distinctions clarifies the role of cartilage in the skeletal system, particularly in relation to vertebrae.

The correct choice is cartilage. This flexible connective tissue is essential in reducing friction and allowing smooth movement at joint surfaces, as well as serving as a cushion between the ends of bones. In the spine, cartilage is specifically located between the vertebrae, where it forms intervertebral discs that provide support and help absorb shock during movement. The presence of cartilage in these areas enhances mobility and helps prevent bone-on-bone contact, which can lead to pain and injury.

The other options refer to structures that serve different functions. Bursa, for instance, is a small fluid-filled sac that acts as a cushion between bones and other moving structures, but it does not cover bone ends or exist specifically between vertebrae. Synovial fluid is the lubricating liquid found within synovial cavities, aiding in the movement of joints, but it is not a substance that directly covers bone ends. Ligaments are tough bands of tissue that connect bones to other bones at joints but do not provide cushioning between the ends of bones. Understanding these distinctions clarifies the role of cartilage in the skeletal system, particularly in relation to vertebrae.