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The familiar sounds of your heart are made by the heart's valves as they open and close.

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Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

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Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.

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Carbamazepine can interfere with the results of home pregnancy tests. If you are taking carbamazepine, do not try to test for pregnancy at home.

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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

A Mediterranean woodland in California shown during the cool moist season, when the herbaceous veget A Mediterranean woodland in California shown during the cool moist season, when the herbaceous veget
The thick bark of the cork oak of the Mediterranean region protects the tree from fire. The thick bark of the cork oak of the Mediterranean region protects the tree from fire.
Organisms exhibit a diversity of behaviours, which include (clockwise from upper left), foraging and Organisms exhibit a diversity of behaviours, which include (clockwise from upper left), foraging and
Upper Paleolithic stone tools include blade-based tools as seen here being produced from a blade cor Upper Paleolithic stone tools include blade-based tools as seen here being produced from a blade cor
Popular Herbal Supplements Popular Herbal Supplements
Noncoding regions include all the 5′UTR, 3′UTR and other noncoding RNA regions. UTR = ... Noncoding regions include all the 5′UTR, 3′UTR and other noncoding RNA regions. UTR = ...
Video: Stroke volume - afterload definition & hypertension

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