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.
For the song by OutKast, see Speakerboxxx/The Love Below. Rooster is a song by the band Alice in Chains. The song was released as a single in 1993 and is featured on the band's second studio album, Dirt (1992). It is the fifth song on the original pressing of the album and sixth on others. The song was included on the compilation albums Unplugged (1996), Music Bank (1999), Greatest Hits (2001), and The Essential Alice in Chains (2006). A demo version of the song was also included on Music Bank. 1 Origin and recording.