|
|
The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.
About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.
Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).
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.
![Patients with physical special needs, such as a wheelchair, need to have this documented in their he](https://biology-forums.com/gallery/47/medium_2137_17_05_12_2_11_15.jpeg)
![The Power and Control Wheels of Abusive Relationships When one person in a relationship repeatedly ...](https://biology-forums.com/gallery/47/medium_660365_25_12_16_12_57_52_244051343.jpeg)