Exposure to more heat can cause health problems and may affect performance. As the temperature or heat burden increases, people may feel: Increased irritability. Loss of concentration and ability to do mental tasks
A parasitic relationship is one in which one organism, the parasite, lives off another organism, the host, harming it and possibly causing death. The parasite lives in or in the body of the host. A few examples of parasites are tapeworms, fleas, and barnacles.