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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

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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 average person is easily confused by the terms pharmaceutics and pharmacology, thinking they are one and the same. Whereas pharmaceutics is the science of preparing and dispensing drugs (otherwise known as the science of pharmacy), pharmacology is the study of medications.

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In 1844, Charles Goodyear obtained the first patent for a rubber condom.

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Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.

General features of a growth factor or hormone signalling pathway that promotes cell division General features of a growth factor or hormone signalling pathway that promotes cell division
Sickled and normal red blood cells Sickled and normal red blood cells
Viruses must infect a host cell to grow and reproduce Viruses must infect a host cell to grow and reproduce
Hair cells Hair cells
Standing at the head of the table, apply oil or lotion to the entire back with bilateral stroking. ... Standing at the head of the table, apply oil or lotion to the entire back with bilateral stroking. ...
The cell duplicates its DNA and prepares for nuclear division The cell duplicates its DNA and prepares for nuclear division
Video: Nucleic acid digestion - brush border enzymes, end products & transport mechanism

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