NREMT EMT

Answer: E - All of the choices above are roles of the circulatory system except transferring sensory information throughout the body, which is the job of the neurological system. Keep in mind that changes in skin color may indicate that the circulatory system is having trouble performing its roles. For example cyanotic (blue) skin can indicate poor removal of carbon dioxide and/or oxygenation of blood. Red skin can indicate blood vessels on the skins surface dilating to help dissipate heat from the body. Sweating on the skin can indicate details of thermoregulation. Swelling of skin at a specific site can indicate an injury or illness requiring immune cells.