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How we exchange gasses…

Science. E-portfolio. Task. How we exchange gasses…. Exchange. Of . Gasses . How it all happens! But first lets see how The air gets to the Alveoli!  . Step 1 . Mouth and Nose .

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How we exchange gasses…

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  1. Science E-portfolio Task How we exchange gasses…

  2. Exchange Of Gasses How it all happens! But first lets see how The air gets to the Alveoli! 

  3. Step 1 Mouth and Nose When you breathe in, your lungs expand, your inter-costal muscles contract which makes the diaphragm move down, the volume of your chest increases while the pressure around your lungs lungs decrease. While you breathe in you suck in air which is oxygen. Oxygen is the reason you are alive.

  4. Step 2 Wind pipe This passage way connects the nose and the mouth. Wind pipe

  5. Step 3 Lungs, Bronchial tube The lungs deliver oxygen to the body and remove carbon dioxide. The left lung is slightly smaller than the right lung to allow room for the heart. Within the lungs, the bronchi branch into thousands of smaller, thinner tubes called bronchioles. These tubes end in bunches of tiny round air sacs called alveoli. The alveoli is where gas exchange happens.

  6. Step 4 Alveoli The wall of the alveolus are one cell thick, which helps gaseous exchange. There is aconstantblood supply to the alveoli. The tissues are moistasthe gasses need to dissolve before they move in and out of the body. How gas transfer… The ‘blood in’ and ‘blood out’ bit is in a different language (sorry about that)

  7. How gas exchange happens. Each of these air sacs (alveoli) are covered in a mesh of tiny blood vessels called capillaries. The capillaries connect to the arteries and veins that move blood around the body. The pulmonary artery delivers blood with carbon dioxide to the capillaries that surround the air sacs. Inside the air sacs, carbon dioxide moves from the blood into the air. Oxygen moves from the air into the blood in the lungs. The oxygenated blood then travels to the heart through the pulmonary vein. The heart then pumps the oxygenated blood out to the body.

  8. Q & A 1. Why do we have nose hair? We have nose hair because when we breathe in air, we also breathe in dust and pollen and other harmful stuff thatisbad for us. The nose hair traps all unwanted material presentin the nose while, the air continues it journey to the lungs.

  9. Q & A 2. What keeps food from going into the lungs? When we swallow food the epiglottis flaps down to close off our esophagus sothat fooddoes not go into that area. The epiglottis acts as a "guard gate", closing off, so food doesn’t enter into the lungs and cause anycomplications. The epiglottis is a thin lid-like flap of cartilage tissue that is attached to the root of the tongue. It is present behind the tongue.

  10. Bibliography "Exchange of Gases." ThinkQuest. Oracle Foundation, n.d. Web. 30 Sept. 2012. <http://library.thinkquest.org/28807/data/resp2.htm>. "What We Know - Gas Exchange." What We Know - Gas Exchange. N.p., n.d. Web. 30 Sept. 2012. <http://peer.tamu.edu/curriculum_modules/organsystems/module_4/whatweknow_lungs.htm>. "Respiratory System." Respiratory System. N.p., n.d. Web. 30 Sept. 2012. <http://www.daviddarling.info/encyclopedia/R/respiratory_system.html>. "AngliaCampus : The Windpipe." AngliaCampus : The Windpipe. N.p., n.d. Web. 01 Oct. 2012. <http://www.jeron.je/anglia/learn/sec/science/body/windpipe.htm>.

  11. Thank you for reading           By Muskaan Vohra 8c

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