What does "cardiovascular systems" mean?
97736
overall system that's working with the heart. Cardio - heart, vascular- blood vessels.
403864
The vertebrate cardiovascular system includes a heart, which is a muscular pump that contracts to propel blood out to the body through arteries, and a series of blood vessels. The upper chamber of the heart, the atrium (pl. atria), is where the blood enters the heart. Passing through a valve, blood enters the lower chamber, the ventricle. Contraction of the ventricle forces blood from the heart through an artery. The heart muscle is composed of cardiac muscle cells.
303652
All right, I'm first going to explain, briefly, the structure of the cardiovascular system, and then I'll move on to how the blood transports oxygen specifically.\n\nYour heart pumps blood from the right ventricle to your lungs, where it exchanges carbon dioxide for oxygen, and then continues to your left atria. The left atria pumps the blood to the left ventricle, which pumps blood through your arteries  to your capillaries, where the oxygen is released so that cells can use it. Carbon dioxide is picked up, and the blood continues to the veins, and back to the right atria.\n\nNow, your blood contains red blood cells, which contain two important molecules, hemoglobin and myoglobin. Both have a high affinity for oxygen, so, in your lungs, where there is a high oxygen concentration, oxygen binds to each of these two molecules (until the equilibrium point is reached). The red blood cells are pumped throughout the body. \n\nIn the body, the concentration of oxygen is lower than in the surrounding atmosphere, so the amount of hemoglobin (and myoglobin) which is binding oxygen decreases until it reaches the new equilibrium point. Active tissues use oxygen quickly, forming lots of CO2, which enters the blood, and is converted to carbonic acid by red blood cells, using the enzyme carbonic anhydrase. The change in pH lowers the affinity of hemoglobin for oxygen, so more oxygen is released from other red blood cells near working tissues. The carbonic acid is released back into the blood from red blood cells, where it dissociates into a proton (H+) and a bicarbonate ion. It travels through the blood back to the lungs, where it is converted back into CO2, and diffuses across the transport surfaces of the lungs due to the concentration gradient. Then the cycle starts over.
87997
It is a general term not specific. It may mean any acute condition related to heart and lungs.\n\nHeart and Lungs are very much inter-related. If any disease affects the heart, the lung is also affected, and vice versa. \n\nThere are certain medical conditions are are Acute and Affect both heart and Lungs e.g. \n->Acute cardiopulmonary Arrest (i.e. sudden stopage of heart and lungs activity like death). \n->Myocardial Infarction with Acute Pulmonary Edema.\n->ARDS (Adult Respiratory Distress Syndrome with Systemic Shock)\n->Pulmonary Embolism with Systemic Shock\n->Pneumothorax with Shock\n->Cardiac Temponade\n(if you want the detail of above medical condition you can visit:\nhttp://www.nlm.nih.gov/medlineplus/encyclopedia.html\nThere are also many other Acute Medical Emergencies those involve the cardiopulmonary abnormalities. \n\nIf you are not a medical person and to answer briefly, i would like to say that it is any sudden abnormality realted to heart and lungs.
686559
Blood pressure is the pressure exerted by the blood on the walls of the blood vessels. Unless indicated otherwise, blood pressure refers to systemic arterial blood pressure, i.e., the pressure in the large arteries delivering blood to body parts other than the lungs, such as the brachial artery (in the arm). The pressure of the blood in other vessels is lower than the arterial pressure. Blood pressure values are universally stated in millimetres of mercury (mm Hg), and are always given relative to atmospheric pressure—the absolute pressure of the blood in an artery with mean arterial pressure stated as 100 mm Hg, on a day with atmospheric pressure of 760 mm Hg, is 860 mm Hg.\n\nThe systolic pressure is defined as the peak pressure in the arteries during the cardiac cycle; the diastolic pressure is the lowest pressure (at the resting phase of the cardiac cycle). The mean arterial pressure and pulse pressure are other important quantities.
1071117
Circulatory - to circulate blood.\nDigestive - to digest food\nMuscoskeletal - support and movement\nRespiratory - for gas exchange\nNervous - signalling/messages (brain, nervous system)\nReproductive - to reproduce\n\nyour best bet is wikipedia if you need a lot of information.
600385
Cardiac cycle is the term used to describe the sequence of events that occur as a heart works to pump blood through the body. The frequency of the cardiac cycle is the heart rate.\n\nEvery single 'beat' of the heart involves three major stages: atrial systole, ventricular systole and complete cardiac diastole. The term systole is synonymous with contraction of a muscle. Electrical systole is the electrical activity that stimulates the myocardium of the chambers of the heart to make them contract. This is soon followed by Mechanical systole, which is the mechanical contraction of the heart.\n\nThe term diastole is synonymous with relaxation of a muscle.\n\nThroughout the cardiac cycle, the blood pressure increases and decreases.
839200
Blood pressure is the pressure exerted by the blood at right angles to the walls of the blood vessels. Unless indicated otherwise, blood pressure refers to systemic arterial blood pressure, i.e., the pressure in the large arteries delivering blood to body parts other than the lungs, such as the brachial artery (in the arm). The pressure of the blood in other vessels is lower than the arterial pressure. Blood pressure values are universally stated in millimetres of mercury (mmHg).\n\nIn medicine, a person's pulse is the throbbing of their arteries as an effect of the heart beat. It can be felt at the neck, at the wrist and other places.\nPressure waves move through the blood vessels, which are pliable; it is not caused by the forward movement of the blood. When the heart contracts, blood is ejected into the aorta and the aorta stretches. At this point the wave of distention (pulse wave) is most pronounced, but relatively slow-moving (3 to 5 m/s). As it travels towards the peripheral blood vessels, it gradually diminishes and becomes faster. In the large arterial branches, its velocity is 7 to 10 m/s; in the small arteries, it is 15 to 35 m/s. The pressure pulse is transmitted 15 or more times more rapidly than the blood flow.\nThe term pulse is also used, although incorrectly, to denote the frequency of the heart beat, usually measured in beats per minute. In most people, the pulse is an accurate measure of heart rate.
38329
The first answer was good, although mostly copy$paste \nhttp://www.nda.ox.ac.uk/wfsa/html/u05/u05_010.htm\n\nThe circulatory system is regulated both by the autonomic nervous system (with two antagonistic systems that may increase peripheral circulation or visceral circulation, slow/accelerate heart rate, etc) and by the endocrine system. Hormones have slower, but more long-term effects than nervous "orders" but both are necessary.
348835
Humans have a closed circulatory system.  It is when the blood is contain in the veins and arteries.  Where the arteries take blood to the body and the veins take it directly back.  In an open system the heart pumps blood out into an open area where the blood just flows over the different body parts and then comes back to the heart on its own.  An open circulatory system is extremely inefficient and a lower form of evolution.
563473
Homeostasis \nHomeostasis is the physiological process by which the internal systems of the body (e.g. blood pressure, body temperature, acid-base balance) are maintained at equilibrium despite variations in the external conditions. \nThe body can maintain the fluid levels using the kidneys, these organs filter out harmful chemicals and excess liquid into the bladder from which the urine is then expelled.  Body temperature is regulated somewhat by the skin, example, if you are hot you begin to sweat and this helps to cool the body, if you are cold you shiver this helps to raise, the body temperature.
937883
Our heart is a pump, a very efficient one. The whole body consists of various circuits. And there are valves which control the flow of blood. Since the heart pumps blood, that is, it sends the blood at a certain pressure, the flood flows to various body parts and back, whatever the body position is, horizontal or vertical. This applies to the lowest part of our bodies (foot) too, when we stand up.
136322
The cardiovascular system is a closed system, meaning that blood remains inside the vessels no matter how small they are.  The process of diffusion drives oxygen, carbon dioxide, wastes and nutrients between the tissues and the blood inside the blood vessels-blood just goes around the body.  Humans have a 4-chambered heart: 2 ventricles and 2 atria (sing: atrium).  The atria receive blood and the ventricles "expel" the blood (pumps the blood away from the heart).  You can partition the heart into two sides (left and right), each with its own ventricle and atrium.   One side is for the systemic circulation (to the body) and the other is for the pulmonary circulation (to the lungs).  Blood (deoxygenated) from the body collects in the right atrium, which passes the blood to the right ventricle, which relays the blood to the pulmonary arteries (arteries to the lungs) to get oxygen and expel carbon dioxide.  Once the blood in the lungs acquires oxygen, it passes to the pulmonary veins and into the left atrium.  Then, the blood goes into the left ventricle and is pumped into the aorta (think of it as the largest artery in the body or like in the water supply, the main tube of water where all of the other tubes originate). From the aorta it goes to the arteries and then to the arterioles and the capillary networks (where gas exchange occurs).  After being depleted of oxygen, it goes to the venules to the veins then to the vena cavae and back into the right atrium and it goes around again. :-)
138406
I'm not sure what you need to know about this subject.\n\nCoronary arteries supply blood to the heart muscle. \nThe coronary arteries regulate the supply of blood to your heart muscle depending on how much oxygen your heart needs at the time, as indicated by:\n\n    * The number of times your heart beats per minute (heart rate).\n    * Your blood pressure.\n    * The force of your heart's contractions.\n    * The thickness of your heart muscle.\n\nSecond link discusses coronary artery disease.
1078725
Systole refers to the active, ejection phase of the cardiac cycle, when the heart muscle forcefully contracts, ejecting blood out of the ventricles into the pulmonary artery and aorta. Diastole refers to the passive, relaxation phase of the cardiac cycle, when the heart's muscular walls relax, allowing the ventricles to fill with blood from the atria, pulmonary veins and vena cavae, in preparation for the next cycle.\n    Ventricular contraction during systole causes blood to leave the heart under high pressure, which is propagated as a pressure (pulse) wave throughout the arterial system. If our arteries were rigid pipes, then when the heart muscle relaxed during ventricular diastole, the blood pressure within the arteries would also drop close to zero. But since our arteries have walls that are highly elastic, the walls stretch and increase in diameter in response to the high pressure pulse wave of systole. Then during diastole, the arterial walls snap back to "normal" like a rubber band that's actively stretched (systole) and then allowed to passively return to normal (diastole). This passive contraction of the arterial walls, due to their elasticity, maintains positive pressure within the arteries during diastole, maintaining blood flow throughout the entire cardiac cycle. Thus, arterial blood pressure varies throughout the cardiac cycle: The maximum is the systolic pressure, and the minimum is the diastolic pressure.
824219
Arteries are major vessels that carry blood away from the heart.  Veins are major vessels that carry blood toward the heart.   Blood pressure is less when carried toward the heart, therefore your answer is artery=larger.  The more pressure needed , a larger part it will be  Veins are thinner and less resistant to blood flow...
606401
The circulatory system (sometimes cardiovascular system) is an organ system that moves substances to and from cells; it can also help stabilize body temperature and pH (part of homeostasis). \nSimply - it is primarily the system of blood transport that moves around nutrients and oxygen to all parts of your body...