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Did you know?

The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

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According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

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Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.

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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.

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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

Atherosclerosis. (a) A sectioned coronary artery that exhibits an accumulation of fatty plaque, whic Atherosclerosis. (a) A sectioned coronary artery that exhibits an accumulation of fatty plaque, whic
Arrector pili muscle Arrector pili muscle
front muscle figure front muscle figure
Muscle cells Muscle cells
Cardiac Muscle Tissue Cardiac Muscle Tissue
A concrete wall of a cold storage room measures 3.0 m high, 5.0 m wide, and 20 cm thick. The ... A concrete wall of a cold storage room measures 3.0 m high, 5.0 m wide, and 20 cm thick. The ...
Video: Cellular defenses (natural killer cells, phagocyte types & process of phagocytosis)

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