There are many routes in introducing drugs into the body. Hypodermic injection per se, is introduction of drugs into a part, as into subcutaneous tissues, the vascular tree, or an organ. the prefix hypo means "under" while the latin word derma refers to the "skin". Transdermal administration on the other hand, is the route wherein active ingredients are delivered through dermis or skin only. One example is the transdermal patches. Thus, hypodermic needle administration is not called transdermal, it is rather called subcutaneous administration.
The organism or product that is being described in the sentence
above is chalk. This is the product that is formed with the use of the remains
of calcium carbonate. It has a mineral calcite and useful for writing or
drawing in smooth and writable surfaces.
