PHYSIOLOGY,RESPIRATION.
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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.
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Caffeine!\nhttp://www.geocities.com/anteriorlobe/images_molecules/Caffeine_0640x480.jpg
179694
carbon, organic compounds
37156
1. respiration is for animals, and phtosynthesis is for vegetals, bacteria and algae.\n\n2. We (animals) use respiration because our cells need a process called gas exchange ( we take Oxygen from the air and exchange it in our cells for carbon dioxide)\n\n3. This is possible for us because our cells have organs called mitocondria, while vegetal cells have chloroplasts.\n\n4.Photosynthesis is an important biochemical process in which plants, algae, and some bacteria harness the energy of sunlight to produce food. Ultimately, nearly all living things depend on energy produced from photosynthesis for their nourishment, making it vital to life on Earth. It is also responsible for producing the oxygen that makes up a large portion of the Earth's atmosphere. Organisms that produce energy through photosynthesis are called photoautotrophs. Half of all photosynthesis comes not from plants, but from bacteria and algae.\n\nResìration involves the use of developed organs such as lungs.\n\n5. Photosynthesis produces energy from sun light, while\nrespiration produces energy from the Oxygen present in pur atmospheric air.
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Yup, oxygen oxidises our bodies. As we are carbon based lifeform, we lose carbon when we breathe out - hence, carbon dioxide.
110443
human body and molecular biology..
194750
Biochemistry,Biotechnology,Biophysics,Pharmacology,Radiology & Dental Surgery.
472494
Pressure on the phrenic nerve.
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carries oxygen around the body
578355
saliva, enzymes, bacteria
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eggs\nbreathing - diffusion\ngetting food - built in\nmovement - no need\n\ntadpole\nbreathing - gills\ngetting food - mouth and jaws, digestive system\nmovement - tail\n\nfrog\nbreathing - lungs and permeable skin\ngetting food - sticky tongue, mouth and jaws, digestive system\nmovement - legs, webbed feet
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Aerobic respiration.\n\nThe key is the "presense of oxygen" part.  Burning sugars in the absense of oxygen is anaerobic respiration.\n\nPhotosynthesis is definately wrong.  That's the capture of photons to boost low-energy electrons for the purpose of making energy, and sugar.
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Plants.\n\nThey breathe in CO2 and breathe out Oxygen
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introduction, body, conclusion
92003
The respiratory system is how you breath in and out. In fact, any organism that participates in gas exchange has a respiratory system. In humans and other mammals, the respiratory system consists of the airways, the lungs, and the respiratory muscles that mediate the movement of air into and out of the body.
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1. Mitochondria\n2. Cilia\n3. Co-enzymes
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That's a big question.\nThese links will help; glycolysis, CAC, ETS: