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Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.
The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.
The familiar sounds of your heart are made by the heart's valves as they open and close.
Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.
Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
![Common skin signs are often evidence of an illness or disorder. A macule is a discolored spot on the ...](https://biology-forums.com/gallery/47/medium_665046_01_03_17_6_26_23_26130687.jpeg)
![Common skin signs are often evidence of an illness or disorder. A nodule is a larger papule; acne ...](https://biology-forums.com/gallery/47/medium_665046_01_03_17_6_26_25_26136243.jpeg)