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人体有206块骨头,骨与骨之间的连结称为——关节。每一个关节往往由两块或三块甚至四块骨头构成。关节,以其相对的两个骨面间具有间隙为特点,两个或多个相对的骨面称关节面,关节面之间往往没有直接联系,而是由附着在关节面以外的纤维结缔组织膜即关节囊相连结。两个骨面间的空隙称为关节腔。关节面、关节囊、关节腔是关节的三个基本特性。众所周知,关节的功能主要是进行灵活运动,所以有人称关节是人体内的枢纽。
The body has 206 bones, the link between the bone and the bone is called - the joint. Each joint is often composed of two or three or even four bones. Joints, with its relative gap between the two bone is characterized by two or more opposite bone surface, articular surface, articular surface often not directly connected, but by the attachment of the articular surface of the fibrous connective tissue Membrane joint capsule is connected. The space between the two bones is called the joint space. Articular surface, joint capsule, joint cavity is the joint of the three basic characteristics. As we all know, the main function of joints is flexible, so some people say that the joints are the hub of the human body.