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Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.
Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.
There are 20 feet of blood vessels in each square inch of human skin.
An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.
About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
![Normal development of posture and spinal curves. (A) Toddler: Protruding abdomen; lumbar lordosis. (](https://biology-forums.com/gallery/47/medium_14755_24_09_12_7_41_29_8960395.jpeg)
![Place one hand on the medial and one on the lateral thigh to begin horizontal stroking. Slide hands ...](https://biology-forums.com/gallery/33/medium_380798_23_08_17_1_04_33_33076105.jpeg)