Content deleted Content added
Line 88:
When healthy, the kidneys remove waste products (for example potassium, acid and urea) from the blood and also remove excess fluid in the form of urine. Dialysis treatments have to duplicate both of these functions as ''dialysis'' (waste removal) and ''ultrafiltration'' (fluid removal).
==
===Bacteria===
The first bacteria were observed by [[Anton van Leeuwenhoek]] in 1676 using a single-lens microscope of his own design. The creatures he saw were described as small creatures. The name ''bacterium'' was introduced much later, by [[Christian Gottfried Ehrenberg|Ehrenberg]] in 1828, derived from the [[Greek word]] βακτηριον meaning "small stick". Because of the difficulty in describing individual bacteria and the importance of their discovery to fields such as medicine, biochemistry and geochemistry, the history of bacteria is generally described as the history of [[microbiology]].
| |||