|
|
Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
The average person is easily confused by the terms pharmaceutics and pharmacology, thinking they are one and the same. Whereas pharmaceutics is the science of preparing and dispensing drugs (otherwise known as the science of pharmacy), pharmacology is the study of medications.
Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.
Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.
![That politics was always a rough business is shown in this cartoon, which shows Lincoln, assisted by](https://biology-forums.com/gallery/47/medium_375552_19_08_15_9_26_03_22340753.jpeg)
![Lewis Hine’s 1910 photograph shows a tenement alley in New York City. More famous for his “unsettlin](https://biology-forums.com/gallery/47/medium_6_24_08_15_12_36_55_224271832.jpeg)