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Author Question: Features that are necessary and sufficient for defining a concept are called characteristic ... (Read 54 times) |
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.
The familiar sounds of your heart are made by the heart's valves as they open and close.
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.
It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.