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Most fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.

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Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

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Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

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The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.

Examples of three types of joints found in the body. Examples of three types of joints found in the body.
Body cavities Body cavities
upper body upper body
Hormones Help the Body Regulate Glucose Hormones Help the Body Regulate Glucose
Surface Salinity of the Oceans Surface Salinity of the Oceans
Body plan of an aquatic snail and micrograph of a radula. Body plan of an aquatic snail and micrograph of a radula.
Video: Chronology of leptin research (A history of leptin research)

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