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.
patchy hair loss this type of nonscarring hair loss is called alopecia areata al o pee she uh ar e a tuh it occurs when the body s immune system attacks hair follicles causing sudden hair loss that leaves smooth roundish bald patches on the skin