Your SlideShare is downloading. ×
0
Gas Exchange (Core)      Stephen Taylor       i-Biology.net
Assessment Statements                                                                                         Obj.    6.4....
MrT says…                                                 I pity the fool                                                 ...
Why do we need a ventilation system? We are large organisms. Oxygen cannot diffuse into all our cells directly from the ai...
http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter25/animation__gas_exchange_during_respiration.html
http://www.wisc-online.com/objects/ViewObject.aspx?ID=AP15104
Which process(es) of membrane transport are being used ingas exchange at the membranes of the alveoli?http://www.footprint...
Breathing Exercises – desk yoga(it’s IBDP after all, let’s bust some stress)1. Simple exercises. Keep your neck straight. ...
@IBiologyStephen                                      Please consider a donation to charity via Biology4Good.             ...
Gas Exchange (Core)
Gas Exchange (Core)
Gas Exchange (Core)
Gas Exchange (Core)
Gas Exchange (Core)
Gas Exchange (Core)
Gas Exchange (Core)
Gas Exchange (Core)
Upcoming SlideShare
Loading in...5
×

Gas Exchange (Core)

97,132

Published on

For the IB Biology course.

Published in: Education
0 Comments
10 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
97,132
On Slideshare
0
From Embeds
0
Number of Embeds
38
Actions
Shares
0
Downloads
2,072
Comments
0
Likes
10
Embeds 0
No embeds

No notes for slide

Transcript of "Gas Exchange (Core)"

  1. 1. Gas Exchange (Core) Stephen Taylor i-Biology.net
  2. 2. Assessment Statements Obj. 6.4.1 Distinguish between ventilation, respiration and gas exchange. 2 6.4.2 Explain the need for a ventilation system. 3 6.4.3 Describe the features of alveoli that adapt them to gas exchange. 2 Draw and label a diagram of the ventilation system, including trachea, lungs, 6.4.4 1 bronchi, bronchioles and alveoli. Explain the mechanism of ventilation of the lungs, in terms of volume and pressure 6.4.5 changes caused by the internal and external intercostal muscles, the diaphragm and 3 abdominal muscles. What connections can you make with other topics? Gas ExchangeCommand terms: http://i-biology.net/ibdpbio/command-terms/ Assessment statements from: Online IB Biology Subject Guide
  3. 3. MrT says… I pity the fool who thinks breathing is respiration.http://www.last.fm/music/Mr.T/+images/27372765
  4. 4. Why do we need a ventilation system? We are large organisms. Oxygen cannot diffuse into all our cells directly from the air, nor can waste products be directly ejected from the body. We have specialised organ systems, which are efficient, but need delivery of nutrients and removal of waste. The ventilation system ensures the blood can be the medium for this. We are land-borne. Gases need moist surfaces (membranes) in order to diffuse. Our lungs are moist membranes, allowing oxygen to diffuse into the blood and carbon dioxide to diffuse out. The ventilation system maintains a large concentration gradient between the alveoli and the blood. The constant flow of past the alveoli brings blood with a high CO2 concentration and low O2 concentration. Breathing out keeps the CO2 concentration in the alveoli low, so it diffuses out of the blood. Breathing in keeps O2 concentration in the alveoli high, so it diffuses into the blood.Diagram from: http://www.sciencequiz.net/jcscience/jcbiology/gapfilling/breathingsystem.htm
  5. 5. http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter25/animation__gas_exchange_during_respiration.html
  6. 6. http://www.wisc-online.com/objects/ViewObject.aspx?ID=AP15104
  7. 7. Which process(es) of membrane transport are being used ingas exchange at the membranes of the alveoli?http://www.footprints-science.co.uk/alveoli.htm
  8. 8. Breathing Exercises – desk yoga(it’s IBDP after all, let’s bust some stress)1. Simple exercises. Keep your neck straight. • Rotate shoulders forwards, then backwards, 5 times each. • Bend your neck to touch your head to your shoulder, left then right, 5 times each. • Tilt your head forward, touching chest, then backward, 5 times each.2. Breathing observation • Close your eyes, breathe normally. • “Observe” the breathing process.3. Pranayama • Stand up. • Take gentle, deep breaths. • Feel the air moving in and out, trying to control its flow. • Think happy thoughts about graduation. Breathing exercises from: http://www.healthandyoga.com/html/news/exercise.html Image: 11,750 Foot Yoga Moment http://www.flickr.com/photos/94833286@N00/2838289483 Found on flickrcc.net
  9. 9. @IBiologyStephen Please consider a donation to charity via Biology4Good. Click here for more information about Biology4Good charity donations.This is a Creative Commons presentation. It may be linked and embedded but not sold or re-hosted.
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×