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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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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By definition, when a medication is administered intravenously, its bioavailability is 100%.
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Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.
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The human body produces and destroys 15 million blood cells every second.
Water and salt regulation by isosmotic, hyperosmotic, and hypoosmotic aquatic organisms.
Spanish Water Dog
Structure of the water molecule
Using a water-based cleaning system helps reduce the hazards from using strong chemicals.