Young Siti
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What is the importance of water?
Hey there! Did you know that water is all around us? It's in the soil, ice caps, and even in our own bodies! Depending on factors like where you live, your age, and your body fat, you're made up of about 55-60% water. When we're born, we're even wetter - babies are about 75% water, just like fish! But as we grow up, our water composition drops to about 65%.
By Young Siti9 months ago in Humans
Why do we have to wear sunscreen?
The purpose of sunscreen is to shield the body from the sun's ultraviolet rays, which have many harmful effects. These rays are separated by their different wavelengths, into types such as UVA and UVB. The primary two chromophores are hemoglobin, found in our red blood cells, and melanin, which gives our skin its pigment. We know that UVB rays cause the skin to burn. The role of UVA rays is less well understood and appears to have an effect on our tanning response, carcinogenesis, and aging.
By Young Siti9 months ago in Humans