- published: 22 Sep 2009
- views: 70
A gill (i/ɡɪl/) is a respiratory organ found in many aquatic organisms that extracts dissolved oxygen from water and excretes carbon dioxide. The gills of some species, such as hermit crabs, have adapted to allow respiration on land provided they are kept moist. The microscopic structure of a gill presents a large surface area to the external environment.
Many microscopic aquatic animals, and some larger but inactive ones, can absorb adequate oxygen through the entire surface of their bodies, and so can respire adequately without a gill. However, more complex or more active aquatic organisms usually require a gill or gills.
Gills usually consist of thin filaments of tissue, branches, or slender, tufted processes that have a highly folded surface to increase surface area. A high surface area is crucial to the gas exchange of aquatic organisms, as water contains only a small fraction of the dissolved oxygen that air does. A cubic meter of air contains about 250 grams of oxygen at STP. The concentration of oxygen in water is lower than air and it diffuses more slowly. In fresh water, the dissolved oxygen content is approximately 8 cm3/L compared to that of air which is 210 cm3/L. Water is 777 times more dense than air and is 100 times more viscous. Oxygen has a diffusion rate in air 10,000 times greater than in water. The use of sac-like lungs to remove oxygen from water would not be efficient enough to sustain life. Rather than using lungs, "[g]asesous exchange takes place across the surface of highly vascularised gills over which a one-way current of water is kept flowing by a specialised pumping mechanism. The density of the water prevents the gills from collapsing and lying on top of each other, which is what happens when a fish is taken out of water."
כנופיות. עכשיו יש לו שתי משימות: לקנות מפטיר בבית הכנסת לזכר אחיו ולנקום את מותו....מפטיר טריילר קולנוע ישראלי דויד דזאנאשוילי פעולה פשע אלימות נקמה
Congratulations for your engagement, we are very, very happy for you guys. This is a little reminder of how things can go horribly, horribly wrong... :) Gill & Hadas
A short sci-fi
כנופיות. עכשיו יש לו שתי משימות: לקנות מפטיר בבית הכנסת לזכר אחיו ולנקום את מותו....מפטיר טריילר קולנוע ישראלי דויד דזאנאשוילי פעולה פשע אלימות נקמה
Congratulations for your engagement, we are very, very happy for you guys. This is a little reminder of how things can go horribly, horribly wrong... :) Gill & Hadas
A short sci-fi
Please support the official release! ➤ http://bit.ly/TFSFuniNow Wanna raise your power-level? Subscribe! ➤ http://bit.ly/TFSYTSub Join in our Streams Tues Thurs & Fri at 6CT! ➤ http://bit.ly/2jbUJa8 Want More DBZ? ➤ http://bit.ly/2iLK7eW Please support the official release! ➤ http://bit.ly/TFSFuniStore Dragonball Z Abridged Parody follows the adventures of Goku, Gohan, Krillin, Piccolo, Vegeta and the rest of the Z Warriors as they gather Dragonballs and fight intergalactic evil. With the comedic writings of Lanipator, Takahata101, and KaiserNeko this may not be the DBZ you remember but TFS hopes you enjoy it all the same. How high can the Krillin Owned Count get? Who will be the next to go Super Saiyan? Can Vegeta's ego get any bigger? Find out NOW on DBZ Abridged! TeamFourStar is a...
Dragonball Z Abridged Parody follows the adventures of Goku, Gohan, Krillin, Piccolo, Vegeta and the rest of the Z Warriors as they gather Dragonballs and fight intergalactic evil. With the comedic writings of Lanipator, Takahata101, and KaiserNeko this may not be the DBZ you remember but TFS hopes you enjoy it all the same. How high can the Krillin Owned Count get? Who will be the next to go Super Saiyan? Can Vegeta's ego get any bigger? Find out NOW on DBZ Abridged! TeamFourStar is a group of voice actors, sound designers, musicians and entertainers based out of Texas. Most noted for the series Dragonball Z Abridged, TFS loves to make comedy and specifically parody. You can find more of our work on our website: http://teamfourstar.com Follow us on Twitter: http://twitter.com/teamfourst...
Seniors Alina Weinstein, Jaclyn Kantecki, Elise Gill and Macy Hyatt certainly had much to celebrate on Senior Day as the Illini scored a 196.300 for the second time this weekend to defeat Ball State's 193.500 and UIC's 192.625. Illinois' score was powered by the fourth highest floor routine in school history with a 49.425. In addition, Alina Weinstein, Giana O'Connor, Elizabeth McNabb and Sunny Kato all took home individual titles as Illinois swept the competition.
Team Name V UB BB FX Team Score Illinois-Champaign 48.925 49.025 48.775 48.975 195.700 Meet # First Name Last Name V UB BB FX AA 726 Kelsi Eberly - - 9.100 9.625 - 726 Sarah Fiedler - 9.825 9.700 9.575 - 726 Elise Gill 9.850 - - 9.800 - 726 Kelsey Joannides 9.775 9.900 9.675 9.825 39.175 726 Jaclyn Kantecki 9.775 9.775 - - - 726 Elizabeth McNabb 9.525 - 9.850 - - 726 Amber See 9.750 9.675 9.850 9.900 39.175 726 Alina Weinstein 9.775 8.650 9.700 9.825 37.950 726 Hannah Welker - 9.850 - - - Ohio State 49.075 48.825 49.050 48.625 195.575 Meet # First Name Last Name V UB BB FX AA 57 Victoria Aepli - - 8.575 - - 57 Colleen Dean 9.800 9.750 9.850 9.775 39.175 57 Alex DeLuca - 9.750 ...
☤ Scientism Exposed 📡 a "Science Falsely So Called" Documentary Film. https://celebratetruth.org/ Revealing the true Creator of creation. What if there has been an agenda to keep people from the Truth of God? What if everything modern day science has taught you about your origins is wrong? Make no mistake; the very foundation of all of mankind’s “knowledge” depends on what is believed to be the Truth about the Origin of all that exists. “Scientism Exposed” is the long-awaited documentary film uncovering the spiritual agenda and deception with the scientific worldview that many teach today as proven truth and fact. Do you believe in billions or do you believe in the Bible? To purchase the DVD, learn more about the film or get the latest news go to: https://celebratetruth.org/ 🔭🔬⚛ 🚀☤ 📡✇ ...
Lynne Joyrich AM ’84, PhD ’90, Associate Professor of Modern Culture and Media; Suzanne Stewart-Steinberg, Associate Professor of Comparative Literature; and Italian Studies, and Debbie Weinstein ’93, Assistant Director of the Pembroke Center discuss the rise of therapeutic culture in modern America. 2011 Family Weekend Program
REDEFINING ADOPTION IN A NEW ERA: OPPORTUNITIES AND CHALLENGES FOR ADOPTION LAW AND SOCIAL WORK PRACTICE Thursday 4th September 2014 at UCC Domestic Adoption Keynote Address Philomena Lee (Birth Mother whose story inspired the Oscar‐nominated film ‘Philomena’) and her daughter, Jane Libberton ‘Philomena, her Story in her own Words’ Convenors: Drs Aisling Parkes, Dept of Law and Simone McCaughren, Dept of Applied Social Studies, UCC @LawUCC
Episode 512 Mitchell is a 1975 film starring Joe Don Baker as an abrasive, alcoholic police detective. Very much an anti-hero, Mitchell often ignores the orders of his superiors in pursuit of his targets, and demonstrates disdain for by-the-book police work as well as normal social graces. The film also stars John Saxon and Martin Balsam as the criminals Mitchell pursues throughout the film. Linda Evans and Merlin Olsen appear in supporting roles as a prostitute and henchman, respectively. Be sure and notice the genre-busting soundtrack. The movie starts out with a Shaft inspired rubber guitar solo, the chase scenes have a lovely 2 bar light rock/corporate PR film melody, and interspersed with that is some piano noodling that sounds vaguely similar to Nadia's Theme. And if that isn't eno...
ATP's 2011 Opening Keynote Speaker was Bruce Weinstein, PhD, The Ethics Guy.