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.
Cooling down after exercise restores your breathing and heart rate back to normal. Photo Credit Polka Dot Images/Polka Dot/Getty Images. Most people are familiar with how their bodies feel during exercise; the heart beats faster and it becomes harder to breathe.our heart rate will still increase while exercising, but not as sharply because the heart is strengthened; your breathing will intensify, but you may be less winded. Once your exercise routine is complete, breathing and heart rate will return to normal more quickly.