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.
Respiratory System The Respiratory System The Respiratory System supplies the blood with oxygen in order for the blood to deliver oxygen to all parts of the body. The Circulatory System The Circulatory System transports blood and oxygen from the lungs to tissues in the body.iaphragm The lungs are a very important part of the respiratory system. They bring oxygen into the body and remove carbon dioxide. The bronchioles are the main passageway into the lungs in the bronchus. The alveoli is an air cell of the lungs.