There are more bacteria in your mouth than there are people in the world.
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Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.
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The average adult has about 21 square feet of skin.
Key stages of meiosis and mitosis
Vinyl record
An example of an intake screen in an electronic health record.
(A) In hyperopia, light rays focus behind the retina, making it difficult to focus on objects at ...
Two techniques for holding and inserting an otoscope