Podiatrist podiatric medical school, followed by a three or four-year hospital-based surgical residency. Podiatrists are licensed in all 50 states. Worldwide, in many countries the term "podiatrist "refers to allied health professionals who specialize in the treatment of the lower extremity, particularly the foot. Podiatrists in these countries are specialists in the diagnosis and treatment of foot pathology, but not through surgical means. In some circumstances these practitioners will further specialise and, following further training, perform reconstructive foot and ankle surgery. In contrast, American podiatrists who hold a Doctor of Podiatric Medicine (D.P.M.) complete surgical residencies, and thus all practitioners are
Composition of the human body viewed on an atomic and molecular scale as shown in this article. The estimated gross molecular contents of a typical 20-micrometre human cell is as follows: Body composition can also be expressed in terms of various types of material, such as: There are many species of bacteria and other microorganisms that live on or inside the healthy human body. In fact, 90% of the cells in (or on) a human body are microbes, by number (much less by mass or volume). Some of these symbionts are necessary for our health. Those that neither help nor harm humans are called commensal