True
The bones at the elbow are joined by a hinge joint, which is a type of synovial joint that allows movement in one direction, similar to how a door hinge works. In this case, the bones of the upper arm (humerus) and the forearm (radius and ulna) are connected in such a way that they can bend and extend along a single axis.
Concept: The statement that The bones at the elbow are joined by a hinge is indeed true. Hinge joints are formed where the bones can move only along one axis, allowing for bending and straightening motions. The elbow joint is classified as a hinge joint because it permits the forearm to move towards and away from the upper arm, creating an angle between them.
Other examples of hinge joints in the human body include the knee and ankle joints. These joints also function similarly, allowing limited movement in one direction. Additionally, the interphalangeal joints in the fingers and toes are considered hinge joints as well, where the bones bend to reduce the angle between them, allowing actions like curling the fingers or toes.
The movement at the elbow joint helps in activities like lifting, throwing, and pushing, where bending and extending the arm are essential. While performing activities like holding a flat hand or making a fist, the angle between the bones at the elbow changes. This hinge mechanism is crucial for efficient and controlled arm movements.
In summary, the bones at the elbow are indeed joined by a hinge joint, allowing for smooth, controlled movements.
