IB Biology: B3.3-Structure of Synovial Joints

Front

What is a joint?

Back

A joint is a junction where two or more bones meet, serving as points of contact between bones or between cartilage and bones.

Front

How are joints classified?

Back

Joints are classified as fibrous joints (no movement), cartilaginous joints (slight movement), and movable joints (permit free movement).

Front

What are synovial joints?

Back

Synovial joints are a type of movable joint that allow movement of bones against each other and permit a wide range of motions such as pivot, hinge, rotation, saddle, and gliding.

Front

Where can examples of synovial joints be found?

Back

Examples of synovial joints can be found at the elbow, knee, shoulder, and hips.

Front

What role do bones play in joints?

Back

Bones provide anchorage for muscles and ligaments and guide the type of movement that can occur at the joint.

Front

What is the function of cartilage in joints?

Back

Cartilage is a tough, smooth tissue that covers the ends of the bones at the joint, preventing friction by avoiding direct contact between the bones and absorbing shocks.

Front

What is the role of synovial fluid?

Back

Synovial fluid fills the cavity in the joint between the cartilages, lubricating the joint and helping to prevent friction.

Front

What are ligaments?

Back

Ligaments are tough cords of tissue that hold the bones at the joint in place, preventing dislocation.

Front

How do muscles contribute to joint movement?

Back

Muscles contract and relax to cause movement at the joint.

Front

What are tendons?

Back

Tendons are tough connective tissues that attach the muscles firmly to the bones.