Ultraviolet Radiation
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The sun emits ultraviolet radiation. UVB rays hit the epidermis which causes skin reddening and sunburn. UVA rays have a longer wavelength and can penetrate the deeper layers of the skin.
Duration: 00:18
Published: 11/24/2015
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AIDS
White blood cells, which are produced in the bones, are a major component of the body's immune system. When an infectious organism such as a virus or bacteria enters the body, the ...
Abduction and Adduction of the Arm
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When you eat, your body uses this food to fuel the cells. The absorptive state of metabolism lasts for about four hours, during and after each meal. Throughout this state, digested...
Accessory Glands
Along the male reproductive tract, there are three accessory glands; the seminal vesicles, prostate gland, and bulbo-urethral glands. These glands produce the fluid component of se...
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