|
|
Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.
Studies show that systolic blood pressure can be significantly lowered by taking statins. In fact, the higher the patient's baseline blood pressure, the greater the effect of statins on his or her blood pressure.
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
![In this painting evangelist George Whitefield appears to be cross-eyed. This is no fault of John Wol](https://biology-forums.com/gallery/47/medium_374628_15_08_15_11_50_50_222292090.jpeg)
![This engraving of the Boston Massacre (1770) became the most reprinted depiction of the event, and p](https://biology-forums.com/gallery/47/medium_374628_15_08_15_11_50_51_22235741.jpeg)