| 词汇 | hinge-joint |
| 释义 | hinge joint noun[ C ] anatomy specializeduk /ˈhɪndʒ ˌdʒɔɪnt/ us /ˈhɪndʒ ˌdʒɔɪnt/ a joint(= a place in the body where two bones connect) that allows movement in only one direction, such as the knee or the elbow: Ball and socket joints allow a circular movement, whereas hinge joints allow less movement. The bone of the upper arm meets both the ulna and radius to form a hinge joint at the elbow. The knee joint is by nature a hinge joint, allowing flexion normally to a maximum of 135 degrees, but no extension. The ankle joint is a hinge joint, normally permitting movement in one plane. Although the knee is a hinge joint, meaning that it can only flex and extend, it is a very complex joint. Bone structures acetabular acetabulum acromial acromioclavicular acromion foramen magnum frontal bone glenoid gnathic gynecoid osteophyte osteotomy parietal parietal bone pectoral girdle TMJ trapezoidal triquetrum true rib tubercle |
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