Infectious diseases are caused by microorganisms, such as bacteria, viruses, ... If the right test is not done, doctors may not identify the cause of infection. ... Also, there must be enough of them, and they must be large enough to be ... Did You Know. ... Infectious Mononucleosis · Infectious Arthritis · Crohn Disease. 1; 2; 3 ...
<span>Epidermis is the top layer of the skin, the part of the skin you see. Dermis is the second layer of skin. It's much thicker and does a lot for your body. <span>Subcutaneous fat is the bottom layer.</span></span>