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Wood first appeared in plants called progymnosperms.
Arthroscopic surgery. In this illustration, the knee joint is undergoing surgery with a specialized
Headsets are ergonomically correct and allow the medical assistant or receptionist to use both hands
The upper intake manifold, often called a plenum, attaches to the lower intake manifold.
Binary Acids and Their Properties
A thin cleft, called the synapse, separates one cell from another.