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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
Endocarditis. The human heart has been sectioned to reveal the left ventricle and origin of the aort
Photograph of the flea that transmits Yersinia pestis to cause bubonic plague, called the oriental r
The Land Ordinance of 1785 called for surveying and dividing the Western Territories into square mil
The upper intake manifold, often called a plenum, attaches to the lower intake manifold.