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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.
Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
Your heart beats over 36 million times a year.