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.
The cardiovascular system is responsible for transporting nutrients and removing gaseous waste from the body. This system is comprised of the heart and the circulatory system. Structures of the cardiovascular system include the heart, blood vessels, and blood.The lymphatic system is also closely associated with the cardiovascular system.tructures of the Cardiovascular System. 1  Heart. 2  The heart is the organ that supplies blood and oxygen to all parts of the body. 3  This amazing muscle produces electrical impulses through a process called cardiac conduction. 4  These impulses cause the heart to contract and then relax, producing what is known as a heart beat.