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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

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Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

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The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.

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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

Areas of Mediterranean shrubland in southern California periodically burn over large areas, destroyi Areas of Mediterranean shrubland in southern California periodically burn over large areas, destroyi
Multiple sclerosis (MS). (a) A disease characterized by the gradual development of small areas of ha Multiple sclerosis (MS). (a) A disease characterized by the gradual development of small areas of ha
Major Impacts on Mercury and on Our Moon Major Impacts on Mercury and on Our Moon
major endocrine gland major endocrine gland
To find the derivative use product rule To find the derivative use product rule
Major Groups of Fungi Major Groups of Fungi
Video: Energy Flow - Trophic Levels and Food

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