A freely movable joint that includes the shoulder, elbow, wrist, and thumb is called a(n)
a. amphiarthrosis joint. c. synarthrosis joint.
b. diarthrosis joint. d. gliding joint.
B
A freely movable joint that includes the shoulder, elbow, wrist, and thumb is called a diarthrosis joint. There are three categories of skeletal joints in the body including synarthroses, amphiarthroses, and diarthroses. Only the diarthroses or synovial joints are freely movable because they have bones that are separated from each other and are enclosed in a joint cavity filled with a fluid. The amphiarthrosis joints are slightly movable. The synarthrosis joints are immovable. A gliding joint is a type of synovial joint that includes the vertebrae and tarsal bones of the ankle.
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