The Respiratory System
Sophie Vernon, Sophia Tiberi, and Alexa Canzano
How does air get into the lungs?
● As your lungs expand, air is sucked in
through your nose/mouth
● The air travels down your windpipe into
your lungs
● After passing through your bronchial
tubes, theDurani,
airYamini.
finally
enters the alveoli
"Lungs and Respiratory System." KidsHealth - the
Most Visited Site about Children's Health. The Nemours
(air sacs) Web's
Foundation, 1 Oct. 2012. Web. 17 Nov. 2014.
<http://kidshealth.org/teen/your_body/body_basics/lungs.html#>.
What is the role of the
diaphragm?
● Main muscle for inhalation/inspiration
(breathing in)
Taylor, Tim. "Diaphragm."
InnerBody. InnerBody.com. Web.
13 Nov. 2014.
<http://www.innerbody.com/imag
e/musc06.html#full-description>.
Alveoli
●
●
●
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At the end of bronchioles
Large surface area
Thin
Surrounded by capillaries
Gas exchange
C02 travels back through alveoli so that body can
exhale C02
"Where Are the Alveoli Located in the Body?" EHow. Demand Media, 24
Aug. 2009. Web. 13 Nov. 2014
http://www.ehow.com/facts_5340881_alveoli-located-body.html
Pathways of Food and Air
"The Human Respiratory System."
Respiratory System. N.p., n.d. Web.
17 Nov. 2014.
"Detoxing and Fibre = Healthy Digestive
System | Herbalife Training the EZHealthBiz
Way!" Herbalife Training the EZHealthBiz
Way Detoxing and Fibre Healthy Digestive
System Comments. N.p., n.d. Web. 18 Nov.
2014.
Gas Exchange and Pressure Gradient
Alveolus: tiny air sac that controls/adjusts the rate of breathing
Thin respiratory membrane
Inward-directed gradient for oxygen
Outward-directed gradient for carbon dioxide
During each respiratory cycle, the thoracic cavity’s volume increases,
then decreases. Pressure gradients between air inside and outside the
respiratory tract change.
● A different pressure helps keep the lungs close to the thoracic cavity wall
during a respiratory cycle even through exhalation
●
●
●
●
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Yoneda, MD - Pulmonology, Ken Y., and E. Gregory Thompson, MD - Internal Medicine. "Gas
Exchange in the Lungs." WebMD. WebMD, 12 Mar. 2014. Web. 17 Nov. 2014.
<http://www.webmd.com/digestive-disorders/gas-exchange-in-the-lungs>.
●
Concentration Gradient
The above diagram shows the direction of
blood flow. The carbon dioxide molecules
(blue triangles) move from the blood to the
lungs because they follow the concentration
gradient from high to low. Oxygen (pink
circles) moves from the lungs to the blood.
Ivy, Rose. "Internal Respiration." Breathing and the Human Respiratory
System. IvyRose, 1 Jan. 2013. Web.
17 Nov. 2014.
<http://www.ivyroses.com/HumanBod
y/Respiratory/Respiratory_Internal_R
espiration.php>.
Connection to Circulatory System
● Oxygen travels through blood
●
Diffusion
● Circulatory system brings it to body
● Gas Exchange
● Capillaries surround alveoli
"What Is the Connection Between the
Circulatory System and Respiratory
System?" WiseGEEK. N.p., n.d. Web. 18
Nov. 2014.
Blood
Components: red blood cells, white blood cells, platelets, plasma
Gas Exchange: In the lungs, oxygen and carbon dioxide are exchanged in the
alveoli at the end of the bronchial tubes. The alveoli are surrounded by
capillaries. When a person inhales, oxygen is transferred from the alveoli to
the capillaries into the bloodstream. Simultaneously, carbon dioxide moves
into the capillaries and the alveoli from the bloodstream. CO2 is removed
from the lungs when you exhale.
● O'Neil, Dennis. "Human Blood: Blood
Components." Human Blood: Blood
Components. Behavioral Sciences
Department, Palomar College, San
Marcos, 1 Jan. 2013. Web. 17 Nov.
2014.
<http://anthro.palomar.edu/blood/blo
od_components.htm>.
Path of respiratory system:
https://www.youtube.com/watch?v=o2OcG
gJbiUk
Bibliography
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Taylor, Tim. "Diaphragm." InnerBody. InnerBody.com. Web. 13 Nov. 2014.
<http://www.innerbody.com/image/musc06.html#full-description>.
"Where Are the Alveoli Located in the Body?" EHow. Demand Media, 24 Aug. 2009. Web. 13
Nov. 2014 http://www.ehow.com/facts_5340881_alveoli-located-body.html
Durani, Yamini. "Lungs and Respiratory System." KidsHealth - the Web's Most Visited Site about
Children's Health. The Nemours Foundation, 1 Oct. 2012. Web. 17 Nov. 2014.
<http://kidshealth.org/teen/your_body/body_basics/lungs.html#>.
O'Neil, Dennis. "Human Blood: Blood Components." Human Blood: Blood Components.
Behavioral Sciences Department, Palomar College, San Marcos, 1 Jan. 2013. Web. 17 Nov.
2014. <http://anthro.palomar.edu/blood/blood_components.htm>.
Yoneda, MD - Pulmonology, Ken Y., and E. Gregory Thompson, MD - Internal Medicine. "Gas
Exchange in the Lungs." WebMD. WebMD, 12 Mar. 2014. Web. 17 Nov. 2014.
<http://www.webmd.com/digestive-disorders/gas-exchange-in-the-lungs>.
Ivy, Rose. "Internal Respiration." - Breathing and the Human Respiratory System. IvyRose, 1
Jan. 2013. Web. 17 Nov. 2014.
<http://www.ivyroses.com/HumanBody/Respiratory/Respiratory_Internal_Respiration.php>.
Bibliography
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"How Is the Structure of the Alveoli Ideally Suited to Their Function?"Yahoo! Answers. Yahoo!,
n.d. Web. 18 Nov. 2014.
https://answers.yahoo.com/question/index?qid=20090717095029AA9qDjt
"The Human Respiratory System." Respiratory System. N.p., n.d. Web. 17 Nov. 2014.
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/P/Pulmonary.html
"Detoxing and Fibre = Healthy Digestive System | Herbalife Training the EZHealthBiz Way!"
Herbalife Training the EZHealthBiz Way Detoxing and Fibre Healthy Digestive System
Comments. N.p., n.d. Web. 18 Nov. 2014. <http://ezhealthbiz.com/detoxing-and-fibre-healthydigestive-system/>.
"Exchanging Oxygen and Carbon Dioxide." : Biology of the Lungs and Airways: Merck Manual
Home Edition. N.p., n.d. Web. 16 Nov. 2014.
<http://www.merckmanuals.com/home/lung_and_airway_disorders/biology_of_the_lungs_and_ai
rways/exchanging_oxygen_and_carbon_dioxide.html>.
"What Is the Connection Between the Circulatory System and Respiratory System?" WiseGEEK. N.p., n.d. Web. 18 Nov.
2014. <http://www.wisegeekhealth.com/what-is-the-connection-between-the-circulatory-system-and-respiratorysystem.htm>.