why does oxygen move from the alveoli into the pulmonary capillary blood?
109263
Cl- rushes out of RBC as HCO3- rushes into RBC (chloride shift), HCO3- combines with H+ to form carbonic acid that immediately splits into CO@ and H2O.  CO2 moves outside RBC and diffuses into alveoli, allowing O2 to cross into the bloodstream and combine with Hgb in RBC.  The diffusion occurs mainly due to the partial pressure of O2 being higher in the alveoli than the blood, and vice versa for the CO2. Partial pressures exert themselves as if no other gas were present (Dalton's Law).
406302
a) When you inhale, air goes through your nostrils and into you air ways all the way to your lungs.\nb) Inside your lungs are small alveoli that capture O2 molecules and trap them for your red cells to start working.\nc) Each red cell is like a carrier that excahnges O2 molecules for CO2 moluecules (those of used air on your bloodstream)\nd) Red cells go through your blood to every tiny place in your body giving oxygen where is needed and taking CO2 back to the lungs.  Your lungs get rid off those CO2 molecules when you exhale.\ne) You heart pumps blood in two directions:  It makes the blood with carbon dioxide (CO2) go to the lungs and the blood that is oxygen rich, go to all your body.  Your brain is the primary oxygen client in your body.
916179
oxygen helps in breathing of the million cells in your body.Blood transfers oxygen to the cells & the cells can carry out their processes with help of oxygen.Since everything requires energy to carry on its processes,human require oxygen to carry out its process of living
917084
The alveoli is crucial in supplying fresh oxgen which would be transported to the heart via the pulmonary vein.\n\nIs this okay?
1057994
this may not be the answer you are looking for... but here it is anyway...\n\nthe respiratory system involves providing oxygen for the body. You inhale air which is made of different gases and your lungs absorb oxygen out of the air and you exhale the stuff that isn't absorbed. Oxygen is needed for burning fuel. Every single cell (trillions of them) need this oxygen you just inhaled. How does it get to every single blood vessel? you guessed it! the Circulatory system \n\n... the oxygen rich blood goes to the heart. .. and with every beat gets pumped out in all different directions all over the place and then once the oxygen has been delivered, the spent blood comes back for a refill... this happens many many times per minute. \n\nnow, all this blood would go nowhere without a heart. What is a heart essentially? a big strong muscle that goes and goes and goes for 80 years or more without ever stopping! in addition to this, every move you make, helps blood flow. especially walking, your feet act like mini pumps cuz you step on one foot the blood gets pushed around and then you step on the otehr foot as you walk and it goes on. \n\nAnd of course the nervous system. This has instructions directly form mission control ... your brain. It controls your heart speed, breathing speed, blood flow to different parts of the body depending on which part needs how much at what time and everything. None of these systems could normally work without the other one ... but if your nervous system goes down, your pretty much a vegetable. \n\nI know I just explained what all these different systems do but hopefully it helps you understand better.
151172
Lungs fill with fluid as a consquence of many reasons.  One such biological reason can include decreased surfactant production by Type II pneumocytes in the lung.  This would result in an increase in the surface tension of fluid lining the alveolar endothelium.  The increase in surface tension of this fluid would pull the alveolus closed and could even eventually collapse it.
131253
Cause cells need oxygen.
541279
R. atrium to r. ventricle, into the pulmonary artery, which carries deoxygenated blood to the lungs. Once blood receives oxygen in the lungs, it returns to the heart via the pulmonary veins. Here it is emptied into the left atrium, then on to the left ventricle, which pumps the oxygenated blood into the aorta and thence out into the systemic circulation.
1042750
Since the oxygen is leaving an area of higher concentration into an area of low concentration (lungs to blood) and the carbon dioxide is doing the reverse the process is called diffusion.
426554
It works with each heartbeat.  The gas moves with each heart beat. The area of the lung where the blood takes the gas is called the A/C membrane (Alveolar/Capillary) the membrane is so thin so the gas can diffuse into the blood.
264480
Oxygen enters the blood in the lungs, where is binds to hemoglobin (which has a strong oxygen-binding affinity). Hemoglobin travels through the blood until it reaches the blood vessels. Once blood reaches the muscles, the carbon dioxide produced by the muscles enters the blood in the form of carbonic acid. The carbonic acid lowers the blood pH, which lowers the affinity of hemoglobin to bind oxygen, releasing large amounts of oxygen into the working tissues of the muscle.
278698
The simple answer is that red blood cells take in oxygen (which is carried by haemoglobin) and release carbon dioxide.\nHowever, only a small amount of carbon dioxide is carried within red blood cells (combined with haemoglobin) - most carbon dioxide is transported in blood plasma.\nAlso, respiration within red blood cells is anaerobic and the waste product from this process is lactic acid (lactate) which is excreted from the cell.\nThe release of carbon dioxide from the red blood cells at the lungs is not exactly excretion.\nSo overall, the answer is that red blood cells take in oxygen and carbon dioxide, plus of course glucose (for respiration) and excrete lactic acid (lactate).
560650
haha the answer above me is funny...what what exactly do you want to know about it? theres a lot to do with respiration...theres inspiration where the air is taken in..this is caused by a contraction of the diaphragm..thens there structures like the epiglotis, trachea, pharynx...then the oxygen goes to your lungs..where gas exchange occurs in the alveoli's...this is done by some complicated process that i dont understand really..i didnt really pay attention during this part of physiology/biology class. haha. anyway, the oxygen is picked up by the pulmonary artery and goes to the rest of the body through the aorta...uhh, i can think of anything else..hope this helps!
207756
To transport Oxygen from the lungs to other tissues, to transport carbon dioxide from tissues to the lungs. White blood cells are used to fight infections. Platelets are used to seal holes in the blood vessels.
1116831
Diffusion of carbon dioxide and oxygen take place in the alveolar of the lungs.  Since there is a higher concentration of oxygen in the alveolar sac as compared to the capillaries surrounding it, the oxygen goes from the higher concentration to that of the lower concentration.  The carbon dioxide is more concentrated in the capillary blood than the alveoli. so it diffuses into the lungs.  \n\nIn photoynthesis water must diffuse into the plant or bacterial cell.  It is then destroyed in what is commonly called the light reactions.  It is separated into Hydrogen ions and oxygen.  The oxygen is released into the air via diffusion and the Hydrogen ions are used to produce ATP.  Since the water is used up more is needed to keep the process up. So more water diffuses into the cell.  In order for tthe palnt to make food from the carbon dioxide that has diffused into the cell as well. It must enter the chloroplast.  Here the Dark reactions of the process occur.  The carbon dioxide is used up along with some of the ATP to make sugar.  SO as the sugar is made and relocated this creates a carbon dioxide deficit in the chloroplast.  So more Carbon dioxide diffuses into it.  This continues until the process stops or the plant dies.
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. :-)
562335
Not really an issue of the lungs getting enough oxygen or glucose.  If the heart is failing, blood starts to get backed up in the lungs.  The result is called "pulmonary edema."  Fluid seeps out of the pulmonary capillaries into the alveoli.  This makes it hard to breathe (it interferes with gas exchange).