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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.
People about to have surgery must tell their health care providers about all supplements they take.
There are 60,000 miles of blood vessels in every adult human.
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.