The exchange of gases (O2 & CO2) between the alveoli & the blood occurs by simple diffusion: O2 diffusing from the alveoli into the blood & CO2 from the blood into the alveoli. Diffusion requires a concentration gradient. in the alveoli must be kept at a lower lever than in the blood. We do this, of course, by breathing - continuously bringing fresh air (with lots of O2& little CO2) into the lungs & the alveoli. Breathing is an active process - requiring the contraction of skeletal muscles.
Quick Answer. During a rooster injection on a knee, the doctor cleans an injection site near the kneecap, inserts a needle and withdraws any extra fluid from the knee area, and then through the same needle injects a solution containing hyaluronic acid, a substance obtained from rooster combs, into the knee joint, according to WebMD.
Common side effects of Euflexxa include joint pain, back pain, pain in extremities, musculoskeletal pain, joint swelling, injection site pain, and arthritis. A dose of 2 mL of Euflexxa is injected intra-articularly into the affected knee at weekly intervals for three weeks, for a total of three injections. Euflexxa may interact with other drugs. Tell your doctor all medications and supplements you use. During pregnancy, Euflexxa should be used only if prescribed.