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Wood first appeared in plants called progymnosperms.
Vertebral compression Fractures of the spine (vertebra) can cause severe ”band-like” pain that radia
Cerebral angiography. The four angiograms each reveal the distribution of blood vessels supplying th
James A. Garfield lies mortally wounded. After failing to locate the bullet, surgeons called in Alex
The upper intake manifold, often called a plenum, attaches to the lower intake manifold.
A thin cleft, called the synapse, separates one cell from another.