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Did you know?

Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

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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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Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.

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IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

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The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.

The effects of beak depth on song among different species of Galapagos finches. The effects of beak depth on song among different species of Galapagos finches.
Extinction of species in the past. Extinction of species in the past.
Invasive species in Canada include (a) zebra mussels, Dreissena polymorpha, (b) sea lamprey, Petromy Invasive species in Canada include (a) zebra mussels, Dreissena polymorpha, (b) sea lamprey, Petromy
The Dugong is an endangered species; the largest remaining population is found in Australian waters The Dugong is an endangered species; the largest remaining population is found in Australian waters
Heliotropium (marine heliotrope) lower leaf surface, showing trichomes and a few stomata Heliotropium (marine heliotrope) lower leaf surface, showing trichomes and a few stomata
Ant species richness by latitude. Ant species richness by latitude.
Video: Endocytosis -Types and Phagocytosis

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