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The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.
Illicit drug use costs the United States approximately $181 billion every year.
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).
![scanning electron micrograph showing an ovum (pink) released by the ovary at ovulation surrounded by](https://biology-forums.com/gallery/47/medium_14755_28_08_12_1_48_04_82471241.jpeg)
![Normal depolarization of the motor end plate: (a) Depolarization: Ach causes calcium to be released ...](https://biology-forums.com/gallery/28/medium_482573_27_04_17_11_54_32_284601945.jpeg)