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A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.

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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

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Medication errors are more common among seriously ill patients than with those with minor conditions.

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