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There are 60,000 miles of blood vessels in every adult human.

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It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.

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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

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More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

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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.

Interior nodes represent common ancestors Interior nodes represent common ancestors
Prolapsed uterus. (a) A prolapse is the abnormal drop of the uterus into the vagina, representing th Prolapsed uterus. (a) A prolapse is the abnormal drop of the uterus into the vagina, representing th
Sociologists study the social factors that underlie human behavior, the experiences that mold us, ... Sociologists study the social factors that underlie human behavior, the experiences that mold us, ...
Common Bacterial Pathogens Common Bacterial Pathogens
Selected Common Neurotransmitters Selected Common Neurotransmitters
Results of a genome-wide association study (GWAS) to detect SNPs Results of a genome-wide association study (GWAS) to detect SNPs
Video: Fractures Animation

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