|
|
The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
There are 20 feet of blood vessels in each square inch of human skin.
A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.
![A guinea pig being examined by a veterinary medical officer for general health and pulmonary conditi](https://biology-forums.com/gallery/47/medium_27581_22_04_12_5_08_27.jpeg)
![Hepatitis B antigens and antibody in an acutely infected patient with recovery. Note the indicators ...](https://biology-forums.com/gallery/31/medium_398119_17_07_17_5_42_59_317922425.jpeg)