Food poisoning occurs when you eat food contaminated with bacteria or other toxins. Symptoms include diarrhea, vomiting, and stomach cramps, and generally start 4 to 36 hours after eating contaminated food. While food poisoning is often caused by bacteria, it can also result from eating poisonous plants (some mushrooms, for instance) and animals (pufferfish). Food poisoning is especially common during summer when food may not be kept cold enough to prevent bacteria from growing.
When you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. This increases the space in your chest cavity, into which your lungs expand. The intercostal muscles between your ribs also help enlarge the chest cavity. They contract to pull your rib cage both upward and outward when you inhale. As your lungs expand, air is sucked in through your nose or mouth.
With inhalation during diaphragmatic breathing, the diaphragm muscle contracts, and pulls downward, which also draws the bottom of the lungs downward, causing them to fill with air. When the contraction of the diaphragm is released, the diaphragm naturally returns up into the thoracic cavity. Figure 5.