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.
To move the air into or out of your lungs the relationship between the air pressure in the lungs and atmospheric air pressure is changed. These changes are brought about by movements of your ribs, which you can see and feel, and by movements of your diaphragm which you canât.The breathing movements change the volume of your chest, which in turn affects the air pressure inside the lungs and cause air to move passively into and out of your lungs.he diaphragm contracts and flattens. This increases the volume of the chest so the air pressure in the lungs decreases. As a result atmospheric pressure forces air into the lungs until the pressure inside and outside the chest is equal again.