Meaning: An unpleasant or disastrous destiny. Classified under: Nouns denoting natural events. Synonyms: doom; day of reckoning; doomsday; end of the world. Context examples: everyone was aware of the approaching doom but was helpless to avoid it / that's unfortunate but it isn't the end of the world. Hypernyms (doom is a kind of...):
P874 The respiratory system contributes to homeostasis by providing for the exchange of gases - oxygen and carbon dioxide - between the atmospheric air, blood, and tissue cells. It also helps adjust the pH of body fluids. The cardiovascular and respiratory systems cooperate to supply oxygen and eliminate carbon dioxide. The respiratory system provides for gas exchange - intake of oxygen and elimination of carbon dioxide -and the cardiovascular system transport blood containing the gases between the lungs and body cells.
Anatomy of the Respiratory System. The respiratory system is responsible for gaseous exchange between the external atmosphere and the blood. It delivers oxygen to the circulatory system for distribution to all body cells and aids in the removal of carbon dioxide.The major organs of the respiratory system are the nose, pharynx, larynx, trachea, bronchi and their smaller branches, and the lungs that contain air sacs called alveoli.t delivers oxygen to the circulatory system for distribution to all body cells and aids in the removal of carbon dioxide. The major organs of the respiratory system are the nose, pharynx, larynx, trachea, bronchi and their smaller branches, and the lungs that contain air sacs called alveoli.