|
|
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.
People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).
When intravenous medications are involved in adverse drug events, their harmful effects may occur more rapidly, and be more severe than errors with oral medications. This is due to the direct administration into the bloodstream.
![The appearance of different types of tissues-muscle, epithelial, nervous, connective-and their locat](https://biology-forums.com/gallery/47/medium_14755_16_09_12_5_52_12_87441522.jpeg)
![The arms can be moved in and out and most pads can be rotated to allow for many different types of ...](https://biology-forums.com/gallery/29/medium_548020_25_05_17_2_57_32_294952204.png)