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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.
It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.
Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.