Defense. If the skin is injured, bacteria can enter the body and may cause infections. Photo Credit flesh wound image by Allyson Ricketts from Fotolia.com. The outermost layer of skin, called the epidermis, acts as a physical barrier between your body and the dirt and bacteria outside.hough normal flora bacteria are not usually harmful, they can cause infections if they enter your body through a wound. Most of these organisms are considered healthy bacteria because they prevent very harmful bacteria, called pathogens, from growing on your skin.
âWeâve focused for many years on the nitric oxide pathway to find new therapies that might improve outcomes for babies with pulmonary hypertension,â Aschner said. In the body, the enzyme nitric oxide synthase (NOS) produces nitric oxide from the amino acid arginine. Aschner and colleagues had discovered that NOS is present in a multi-protein complex, which is important for the activation of NOS and production of nitric oxide.
Nitric oxide is the compound that causes the blood vessels dilate, so the researchers were able to challenge blood vessel function using this simple technique. They observed the degree to which blood vessels dilated using a sophisticated MRI technique, before and after the patients were given the nitroglycerin.