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.
When you work out, your muscles move from a resting state to an active one, and they need more oxygen to do their work. Your body accomplishes this by forcing more oxygen-rich blood to flow through your body. During exercise, your breathing rate increases, and you also take in more air with each individual breath.our lungs take in that increased oxygen, which mixes with your blood, and then goes to your heart, a highly effective pump that delivers blood to the rest of your body. Your body produces more heat during exercise as well. An increase in blood flow also allows the skin to dissipate heat more effectively.