The Democratic Party presidential primaries and caucuses are indirect elections in which voters cast ballots for a slate of delegates to the 2016 Democratic National Convention; these delegates in turn directly elect the Democratic Party's presidential nominee.or the U.S. territories of Puerto Rico, American Samoa, Guam, and the U.S. Virgin Islands; and Democrats Abroad, fixed numbers of pledged delegates are allocated. Each state and U.S territory will also be awarded bonus pledged delegates based on whether they schedule their primary or caucus later in the primary season.
Diaphragmâs Role in Breathing. When the diaphragm contracts and moves lower, the chest cavity enlarges, reducing the pressure inside the lungs. To equalize the pressure, air enters the lungs. When the diaphragm relaxes and moves back up, the elasticity of the lungs and chest wall pushes air out of the lungs. The lungs have no skeletal muscles of their own. The work of breathing is done by the diaphragm, the muscles between the ribs (intercostal muscles), the muscles in the neck, and the abdominal muscles.
During forced exhalation, as when blowing out a candle, expiratory muscles including the abdominal muscles and internal intercostal muscles generate abdominal and thoracic pressure, which forces air out of the lungs.uring forced exhalation, as when blowing out a candle, expiratory muscles including the abdominal muscles and internal intercostal muscles generate abdominal and thoracic pressure, which forces air out of the lungs.