The human body contains many natural polymers, such as proteins and nucleic acids. Cellulose, another natural polymer, is the main structural component of plants. Most natural polymers are condensation polymers, and in their formation from monomers water is a by-product.
Alopecia areata is one type of hair loss that typically causes patches of baldness. In some cases, total baldness develops. In many cases, the hair re-grows, typically after several months. In some cases, the hair loss is permanent.
4 diseases without any prevalence information. Causes of Thin, patchy eyebrow hair that are very rare The following causes of Thin, patchy eyebrow hair appear in the population at a rate of substantially less than 200,000 people per year in the USA: Leprosy. more causes...Â».