|
|
Did you know?
The longest a person has survived after a heart transplant is 24 years.
Did you know?
Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.
Did you know?
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
Did you know?
According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).
Did you know?
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.
![Variation in climatic conditions result in geographic variation in the distribution of biome types a](https://biology-forums.com/gallery/47/medium_33_27_08_11_11_56_24_15442181.jpeg)
![Sickle cell anemia. The clinical manifestations of sickle cell anemia result from pathologic changes](https://biology-forums.com/gallery/47/medium_14755_01_10_12_7_58_57_9218989.jpeg)