Food poisoning is caused by bacteria and, sometimes, viruses or other germs. They can get into the food we eat or the liquids we drink. We can't taste, smell, or see these germs (at least not without a microscope). But even though they're tiny, they can have a powerful effect on the body.
A woman is jogging on a wooded trail. Photo Credit Stockbyte/Stockbyte/Getty Images. Consisting of a series of body parts including the lungs, diaphragm and nasal cavity, the respiratory system is responsible for transporting oxygen and carbon dioxide to and from muscles and tissues.During exercise, the respiratory system increases to meet the demands of the working muscles.o meet the increasing oxygen demands from the working muscles, additional oxygen must be transported through the blood vessels. During exercise, the sympathetic nerve stimulates the veins to constrict to return more blood to the heart.
Effects of physical activity and sports on the respiratory system mainly depend on changes in alveolar CO2 levels. - What are the exact criteria that determine the long-term positive effects of exercise on overall health and well-being? - Are these criteria different in healthy and sick people?