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thumb|350px|One of the large, detailed illustrations in Andreas Vesalius's [[De humani corporis fabrica 16th century, marking the rebirth of anatomy]]

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small fluid-filled sac lined by synovial membrane with an inner capillary layer of viscous fluid

articulation which admits free motion in the joint; the most common type of articulation

medical procedure

thumb|Syndesmosis between ulna and radius of upper arm A syndesmosis (“fastened with a band”) is a type of fibrous joint in which two bones are united to each other by fibrous connective tissue. The gap between the bones may be narrow, with the bones joined by ligaments, or the gap may be wide and filled in by a broad sheet of connective tissue called an interosseous membrane. The syndesmoses found in the forearm and leg serve to unite parallel bones and prevent their separation.

muscles of the abdomen

Slightly movable joint