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Blood is approximately twice as thick as water because of the cells and other components found in it.
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The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.
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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).
![Filter in the vena cava prevents an embolus from traveling to the heart, lungs, or brain; A, Greenfi](https://biology-forums.com/gallery/47/medium_18099_24_10_12_3_18_58.jpeg)
![Typical timing marks. The numbers of the degrees are on the stationary plate and the notch is on ...](https://biology-forums.com/gallery/29/medium_548020_30_05_17_7_49_58_29858613.png)