Question

The knee joint is
A. Gomphosis
B. Cartilaginous joints
C. Suture
D. Synovial joints

Answer 1

Hint: There are different bones, their locations, and the kinds of joints that are used to connect them. In addition, knees possess a hinge joint as they move in only one plane.

Complete answer: As knee can move only in one plane. This movement is similar to the hinge of a door hence, it is known as the hinge joint. Hence, a hinge joint is a joint which allows movement in only one plane. In a hinge joint the end of one bone is concave, and the end of another bone is convex so that it can articulate into it. In the case of the knee joint, the articulation is formed between the patella, tibia, and femur. One articulation is between the femur and the tibia, whereas another articulation is between the femur and the patella. The hinge joint is a type of synovial joint. Thus, the knee joint is a type of synovial joint.
Hence, the correct answer is option (D).

Note: Apart from the knee joint, the hinge joint is also found in the elbow joint of the hand. Due to this reason, the elbow also moves in only one plane. Other than these two places, the hinge joint is not found elsewhere in the body. In the elbow joint, the humerus, the ulna, and the radius articulate. One articulation is present between the humerus and ulna, and another articulation is present between the humerus and radius.