Sign language. It uses only signs made with your hands. You do not have to hear to understand it.
There are three kinds of blood vessels: arteries, veins, and capillaries. Each of these plays a very specific role in the circulation process. Arteries carry oxygenated blood away from the heart. They're tough on the outside but they contain a smooth interior layer of epithelial cells that allows blood to flow easily.
Arrange in two layers, called the phospholipid bilayer. Phospholipid molecule has a head, and two tails. The head is hydrophilic (it likes water) and the tails are hydrophobic (phobic meaning it has a phobia of water, or in simple words, hates water).
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Dictionary’s are made of facts not opinions.
If you're in over your head- you or someone else is saying it sarcastically, it means you should stop trying to defend you're argument you're soooooo wrong
