|
|
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.
Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.
The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.
Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.
![(a) Homologous traits are similar due to shared ancestry. (b) Analogous traits (bats’, birds’, and f](https://biology-forums.com/gallery/47/medium_234464_20_01_15_11_04_39_202642177.jpeg)
![Data from more than 22,000 men over the age of 40, showing the relationship between birth weight and ...](https://biology-forums.com/gallery/47/medium_667187_21_02_17_6_13_02_2563068.jpeg)