Parenteral literally means "bypassing the intestine" and refers to the way in which substances or pathogens enter the body by bypassing the intestinal tract, usually in the form of injections.
ph-value of the skin
Usually the pH-value of the skin lies within a slightly acidic range. This explains the term “the acid mantle of the skin”. This acid mantle prevents the penetration and amplification of germs in the skin.
Proteins (also called albumins) are the "basic element of life". They are molecules composed of amino acids that determine the structure and function of every living cell. They are responsible for the shape and structure of the cells as well as the biochemical processes of metabolism. They have many diverse responsibilities. For example, there are structural proteins (e.g., collagen), enzyme proteins, transport proteins (e.g. hemoglobin), immune proteins, hormone proteins.