2006-12-04 06:56:58 · 16 answers · asked by ~●~נυввℓувυввℓу~●~ 2 in Science & Mathematics ➔ Biology
Each O2 molecule is transported thru the intercellular wall structure of the alveoli of the lungs into the bloodstream, where they are "picked up" by the red blood hemoglobin for transport throughout the body.
2006-12-04 07:00:05 · answer #1 · answered by Lord Bearclaw of Gryphon Woods 7 · 0⤊ 0⤋
Oxygen is a gas, and is governed by the laws of diffusion. It follows the concentration gradient from high in the alveoli to low in blood. To get to the hemoglobin, it must first cross the "barriers to diffusion". How many barriers there are depends on which book you're consulting. Basically, it has to cross the surfactant layer (water with a sphingolipid to reduce surface tension to help keep the alveoli open and also help absorb oxygen molecules), alveolar cells (type I, II, and clara), interstitium, capillary endothelium, plasma, and membrane of the red blood cell. Once in the red blood cell it reversibly binds to hemoglobin, which can bind 4 molecules of oxygen at one time. At the tissues, this progess goes in reverse.
2006-12-04 15:07:19 · answer #2 · answered by janegalt 2 · 0⤊ 0⤋
diffusion, the oxygen poor blood that comes from the heart to the lungs is filled with CO2. based on diffusion, the oxygen breathed into the lungs crosses the membrane and enters the blood to equal out the CO2 - O2 concentration levels. you see, diffusion is the process by which substances more from a higher concentration gradient to a lower one, so if there is excess CO2 in the blood that comes to the lungs, it will move across the artery into the lung to be exhaled out of the body thereby maintaining acid base balance and homeostasis.
2006-12-04 15:03:07 · answer #3 · answered by Jess 3 · 0⤊ 0⤋
oxygen gas is absorbed into the blood from the lungs easily due to the properties of the air sacs in your lungs, the air sacs have thin membranes, large surface areas, are moist and because they are so close to capillaries, they have a good blood supply.these properties are all efficient in gas exchange.
first the oxygen goes down your trachea, into the bronchus then the bronchuoles and then the air sacs(alveoli) it then dissolves into the moist membrane and into the thin membrane of the capillaries..carbon dioxide then moves from your blood into your lungs and we breath it back out again..
2006-12-06 19:42:06 · answer #4 · answered by Princess_Rebel 1 · 0⤊ 0⤋
The Hemoglobin (which contains iron) in your blood exchanges CO2 for Oxygen.
2006-12-04 15:00:12 · answer #5 · answered by Plasmapuppy 7 · 0⤊ 0⤋
oxygenated blood , blood which is rich in hemoglobin is absorbed by a process called diffusion which occurs at the capillaries of the aveoli.
2006-12-04 17:05:56 · answer #6 · answered by Cindy F 1 · 0⤊ 0⤋
when the air goes into your lungs they go into the alveoi which are surrounded by capilaries and the red blood cells absourb the oxygen there and take it to the rest of the body.
2006-12-04 15:43:52 · answer #7 · answered by Kell Bell 1 · 0⤊ 0⤋
Oxygen passes from the air in the alveolus(tiny air sacs)in to the blood vessels.
2006-12-04 15:32:52 · answer #8 · answered by chinnu 2 · 0⤊ 0⤋
By way of the capilaries--which are the smallest of your blood vessels. These go through ALL of your organs, delivering to them AND absorbing.
2006-12-04 14:59:51 · answer #9 · answered by Anonymous · 0⤊ 0⤋
oxygen is attached to haemoglobin in the air sacs of the lungs
2006-12-05 04:04:01 · answer #10 · answered by polly 3 · 0⤊ 0⤋