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Author Question: In the sexual response cycle, the male's penis becomes erect in the ____ phase. a. excitement ... (Read 52 times) |
When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).
Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
The average adult has about 21 square feet of skin.