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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.
Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
In inpatient settings, adverse drug events account for an estimated one in three of all hospital adverse events. They affect approximately 2 million hospital stays every year, and prolong hospital stays by between one and five days.
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.
![Some red squirrels adopt the offspring of related individuals, a likely example of kin selection pro](https://biology-forums.com/gallery/47/medium_33_09_09_11_10_15_28_17161536.jpeg)
![Temperament refers to stable differences in the emotional reactions of different children to similar ...](https://biology-forums.com/gallery/47/medium_667187_21_02_17_4_33_05_255812122.png)