whoa you're breathing! the structure and function of lungs a presentation for your educational...
TRANSCRIPT
Whoa You're Breathing!
The Structure and Function of Lungs
A Presentation for Your Educational Benefit by Blake Tashjian, Caroline Casey, and Matt
Mahoney
The Respiratory System: The Diagram
The Passage of Air
TracheaStructure: • Tube of many cartilage
rings. Purpose: • Maintains structure for
passing air so that it does not collapse.
http://www.naturalhealthschool.com/img/trachea.gif
Cilia and Mucous Lining
CiliaStructure: • Hair-like projections
Purpose: • Moves mucus up
towards the pharynx Mucous Lining Purpose: • Traps contaminants
such as dust or pollen
These two structures help keep the lung system clean.
http://www.cytochemistry.net/Cell-biology/cilia5.jpghttp://content.answers.com/main/content/wp/en-commons/thumb/6/69/250px-
Bronchiolar_epithelium_3_-_SEM.jpg
www.nlm.nih.gov/.../ency/imagepages/19533.htm
The Passage of Air
The Bronchial TreeStructure: • Made of cartilage. • Trachea divides into
two branches: bronchi.
• Then divide into "twigs": bronchioles.
• Then twigs open up to alveoli at the ends.
Purpose: • Spread air from
trachea over as much area as possible.
www.nanomedicine.com/NMI/Figures/8.12.jpg
The End of the Line
AlveoliStructure: • Alveoli are small
clustered sacks at the end of the bronchioles.
• They are one cell thick and are covered in capillaries.
• Have a pulmonary surfactant layer.
http://www.coolschool.ca/lor/BI12/unit11/U11L03.htm
The End of the Line
AlveoliPurpose: • Used for diffusion of oxygen
and carbon dioxide in between the blood and the lungs.
• The spherical clusters increase surface area for diffusion.
• Thin walls allow passive transport a quick process.
• Lots of Capillaries increase contact with blood.
• Pulmonary surfactant prevents collapse during exhalation.
http://www.cartage.org.lb/en/themes/Sciences/LifeScience/GeneralBiology/Physiology/RespiratorySystem/HumanRespiratory/humrespsys3.gif
Red Blood Cells
Absorbs Oxygen- O2 diffuses from alveoli into the capillaries and
into the red blood cells-O2 enters the blood through inhaling
Releases Carbon Dioxide-CO2 diffuses from red blood cells through the
capillary walls into alveoli.-CO2 is released by exhaling
Hemoglobin- a protein molecule in red blood cells that moves oxygen from lungs to body's tissues and
returns carbon dioxide from tissues to lungs
http://www.bloodless.it/hemoglobin.jpg http://science.uwe.ac.uk/research/uploads/CRIB_blood_cells.jpg
Sources"Alveoli." Coolschool. 28 Oct 2008 <http://www.coolschool.ca/lor/BI12/unit11/U11L03.htm>. "Anatomy and Physiology of the Respiratory System Tutorial." The Virtual Autopsy. 28 Oct 2008 <http://www.le.ac.uk/pathology/teach/va/anatomy/case2/frmst2.html>. Campbell, Neil A. Biology. Third ed. University of California, Riverside, California: Benjamin Company, Inc., 1993. "Gas Exchange In Humans". Biology 2210. 28 Oct 2008 <http://www.cdli.ca/~dpower/resp/exchange.htm#Transport>. "Hemoglobin." MedicineNet. 2008. MedicineNet, Inc.. 28 Oct 2008 <http://www.medicinenet.com/>. "How the Lungs Work". National Heart Blood and Lung Institute. 28 Oct 2008 <http://www.nhlbi.nih.gov/health/dci/Diseases/hlw/hlw_all.html>. "How Your Lungs Work". How Stuff Works. 28 Oct 2008 <http://health.howstuffworks.com/lung2.htm>.
Sources Cont."Lung Lobes and the Bronchial Tree". Nanomedicine. 28 Oct 2008 <http://www.nanomedicine.com/NMI/Figures/8.12.jpg>. "Lung Structure and Function". Oncology Research Therapudics, Inc.. 28 Oct 2008 <http://www.ort-inc.com/lung_02.html>. Medlock, Amy. "Hemoglobin." 2007. 28 Oct 2008 <http://www.bloodless.it/hemoglobin.jpg>. "Production of Universal Blood Cells." Blog About Science. 2007. WordPress. 28 Oct 2008 <http://science.uwe.ac.uk/research/uploads/CRIB_blood_cells.jpg>. Starr, Cecil, and Ralph Taggart. Biology: The Unity and Diversity of Life. Pacific Grove: Brooks/Cole, 2001. "Your Lungs: Human Respiratory System." Lungusa. The American Lung Association. 28 Oct 2008 <http://www.lungusa.org/site/pp.asp?c=dvLUK9O0E&B=22576>.