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Application of an ostomy bag or pouch: B, An ostomy nurse applying an ostomy bag to a stoma;
Photograph of the flea that transmits Yersinia pestis to cause bubonic plague, called the oriental r
A woman in a net on a Congo shore. Although the importation of slaves was illegal after 1807, histor
A mound of buffalo skulls. In 1870 an estimated 30 million buffalo roamed the plains; by 1900 there
Common STIs in the United States
The upper intake manifold, often called a plenum, attaches to the lower intake manifold.