Old Hickory Weather Forecast â 10 Day. Old Hickory 1 â 3 Day Weather Forecast Summary: Light rain (total 0.2in), mostly falling on Mon morning. Warm (max 87Â°F on Wed afternoon, min 66Â°F on Mon night). Wind will be generally light.
Diaphragm (muscle): The muscle that separates the chest (thoracic) cavity from the abdomen. The diaphragm is the main muscle of respiration. Contraction of the diaphragm muscle expands the lungs during inspiration when one is breathing air in.We rely heavily on the diaphragm for our respiratory function so that when the diaphragm is impaired, it can compromise our breathing.ontraction of the diaphragm muscle expands the lungs during inspiration when one is breathing air in. We rely heavily on the diaphragm for our respiratory function so that when the diaphragm is impaired, it can compromise our breathing.
When the diaphragm muscle contracts, it pulls the bottom of the lungs downward, causing them to fill, while the ribs flare outward to the sides. The chest and abdominal muscles are not used in diaphragmatic breathing.