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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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.
Malignant breast tumor.
Biotechnology Companies and Fighting Cancer
Treating the breast-feeding mother
MRI image of brain cancer. The bright blue color indicates where the cancer has metastasized.
Classes and Frequency of Breast Cancer Susceptibility Genes