what is the path taken by a oxygen molecule as it diffuses from the lungs into the blood?
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Air travels to the lungs through a series of air tubes and passages. It enters the body through the nostrils or the mouth, passing down the throat to the larynx, or voice box, and then to the trachea, or windpipe. In the chest cavity the trachea divides into two branches, called the right and left bronchi or bronchial tubes, that enter the lungs.\n\nIn the adult human, each lung is 25 to 30 cm (10 to 12 in) long and roughly conical. The left lung is divided into two sections, or lobes: the superior and the inferior. The right lung is somewhat larger than the left lung and is divided into three lobes: the superior, middle, and inferior. The two lungs are separated by a structure called the mediastinum, which contains the heart, trachea, esophagus, and blood vessels. Both right and left lungs are covered by an external membrane called the pleura. The outer layer of the pleura forms the lining of the chest cavity.\n\nThe branches of the bronchi eventually narrow down to tubes of less than 1.02 mm (less than 0.04 in) in diameter. These tubes, called bronchioles, divide into even narrower tubes, called alveolar ducts. Each alveolar duct ends in a grapelike cluster of thin-walled sacs, called alveoli (a single sac is called an alveolus). From 300 million to 400 million alveoli are contained in each lung. The air sacs of both lungs have a total surface area of about 93 sq m (about 1000 sq ft), nearly 50 times the total surface area of the skin.\n\nIn addition to the network of air tubes, the lungs also contain a vast network of blood vessels. Each alveolus is surrounded by many tiny capillaries, which receive blood from arteries and empty into veins. The arteries join to form the pulmonary arteries, and the veins join to form the pulmonary veins. These large blood vessels connect the lungs with the heart.\n\n© 1993-2003 Microsoft Corporation. All rights reserved.
227115
air is moved into the lungs
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when you take a breath in the oxygen is taken into the blood and exchanged for carbon dioxide(which is the waste products of air), the same air is breathed out it takes a second to swap
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they transfer oxygen into the blood stream and co2 out\n\nmore here:\n\nhttp://en.wikipedia.org/wiki/Lungs
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Short and sweet\n\n1.) Each Hemoglobin can carry four oxygen molecules\n\n2.) The binding of one oxygen molecule to hemoglobin induces a conformational change to make it easier for the next oxygen molecule to bind, which makes it easier for the third, which makes it easier for the fourth.\n\n3.) Similarly, with a full hemoglobin, after the first oxygen is released, it's easier for the second one to come off and so on. This phenomenon is why all the oxygen isn't released into the tissue right after it leaves the heart.\n\n4.) Look both ways when crossing the street.
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Oxygen from the air inside the alveoli diffuses into the bloodstream across the exceptionally thin alveolar membranes, and carbon dioxide moves from the blood to the alveoli via the same process.
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Let's just call it Blood Pathway =)\n\nfrom ur system (outside the heart) unoxygenated blood --> right atrium --> tricuspid valve ---> right ventricle ---> pulmonary artery --> lungs (oxygenates blood) ---> pulmonary vein (blood is already oxygenated) ---> left atrium --> bicuspid valve --> left ventricle ---> system (outside heart) \n\nthe cycle goes back... \n\nAlways remember that the atria are the receiving chambers of the heart while the ventricles are the pumping chambers of the heart.\n\nThere are three varieties of blood vessels: arteries, veins, and capillaries. During blood circulation, the arteries carry blood away from the heart. The capillaries connect the arteries to veins. Finally, the veins carry the blood back to the heart.
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There are two possible answers.  Are you referring to the oxygenated blood pathway and the deoxygenated blood pathway or the arterial and venous pathways?  In either case, here is a quick rundown. \n\nThe pathway of oxygenated blood:\nStarting in the lungs:  Pulmonary capillaries, pulmonary venuoles, pulmonary veins, to the left atrium through the mitral valve to the left ventricle, through the aortic valve to the aorta, the arteries, the arterioles and to the systemic capillaries throughout the body.\n\nThe pathway of deoxygenated blood:\nStarting in the systemic capillaries, the venules, veins, then into the right atrium from either the superior vena cava, inferior vena cava or the coronary sinus, then through the tricupid valve into the right ventricle, through the pulmonary valve, the pulmonary arteries, pulmonary arterioles, and into the pulmonary capillaries of the lungs. \n\nArtery Pathway:  Pulmonary Arteries, Coronary Arteries, Aorta, Common Cartoid Artery, Subclavian Artery, Auxillary Artery, Brachial Artery, Radial Artery, Ulnar Artery, Brachiocephalic Artery, Common Iliac Artery, Internal Iliac Artery, External Iliac Artery, Femoral Artery, Popliteal Artery, Anterior Tibial Artery, and Posterior Tibial Artery\n\nVenous Pathway:  Pulmonary Veins, Cardiac Veins, IVC, SVC, Internal Jugular Vein, Subclavian Vein, Auxillary Vein, Brachial Vein, Radial Vein, Ulnar Vein, Brachiocephalic Vein, Common Iliac Vein, Internal Iliac Vein, External Iliac Vein, Femoral Vein, Popliteal Vein, Anterior Tibial Vein, and Posterior Tibial Vein
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The lungs (respiratory system) take in air (using the oxygen and breathing out the carbon dioxide), the heart pumps the oxygen through our arteries (circulatory system)making our blood red.
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Unoxygenated Blood goes from the heart to the lungs and becomes oxygenated.  It then goes back to the heart before being pumped out through the arteries and arterioles to all the parts of the body.  At this point nutrients and oxygen mix with the cells of the body and exchange oxygen for carbon dioxide.  It then goes back to the heart to begin the process over again.
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The Respiratory system has its central processing functions in the lungs.  The lungs compose of thousands of little "sacks" which expand and contract to breath in and out.  In the lungs oxygen is transferred to the red blood cells which contain haemoglobin.  The haemoglobin is very good at storing/transporting oxygen.  This travels around the circulatory system, and the oxygen rich red blood cells visit cappillaries all throughout the body in order to keep the body functions alive.  The deteriorating effects of Oxygen, however, are what cause us to age.  Oxygen is in fact our source of life, and the reason we eventually die.\n\nThe digestive system is the source for all of our growth.  In order to become larger, we must ingest complex chemical compounds and convert these into proteins.  Energy gained from digestion allows us to function internally as well as externally.  Our digestive system allows the heart to pump and function the circulatory system.  The circulatory system is supplied by both the digestive and respiratory systems and transports Oxygen/proteins/white blood cells, etc. around the body.  \n\nSo these three systems are related in that simple way, but there are many other ways to relate the work the digestive and circulatory system do that affect the respiratory system.
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Airway - Make sure there is nothing blocking the mouth or trachea\nBreathing - Oxygen is forced into the patient either via mouth-to-mouth or an air bag\nCirculation (or Compression) - The chest is compressed to circulate blood, thus moving oxygen to the vital organs.
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The starting substances in respiration are a sugar (usually glucose) and oxygen.  The sugar first goes through glycolysis , which breaks it down into 2 pyruvates, 2 ATP, and  2 NADH. Then the 2 pyruvates go into the Krebs cycle (TCA cycle) and more NADH are made, plus 2 GTP.  Then all of the reducing power enters the electron transport chain where electron are transferred to oxygen to make H2O and ATP at the end of the respiration pathway.  The carbons in the glucose are converted into CO2.
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2. An oxygen molecule moving at 560 meters/second.
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it goes into your lungs and then straight into your blood stream from there.  how do you think oxygen gets in your blood??
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Hemoglobin is a complex protein-iron compound in the blood that carries oxygen to the cells from the lungs and carbon dioxide away from the cells to the lungs. Each red blood cell contains about 200-300 molecules of hemoglobin, each molecule of hemoglobin contains several molecules of heme(the pigmented iron containing nonprotein part of the hemoglobin molecule) and each mol. of heme can carry one molecule of oxygen. A hemoglobin molecule contains 4 globin peptide chains , designated in adults as alpha , beta , gamma and delta chains.\nNormal concentration of hemoglobin in the blood is 12 to 16 g/dl in women and 13.5 to 18 in men. In an area of high oxygen concentration such as the lungs , hemoglobin binds with oxygen to form oxyhemoglobin. In atmosphere of low oxygen concentration such as peripheral tissues of the body, oxygen is replaced by carbon dioxide to form carboxyhemoglobin. Hemoglovin releases the carboxyhemoglobin in the lungs for excretion and picks  up more oxygen for transportation to the cells. Sometimes may be spelled haemoglobin.
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when we breath oxygen it enter in to our blood which is called oxyhaemoglobin.it helps in circulation the fresh blood through entire body through artillaries and deocygenated blood goes again for circulation in heart through veins.