Aim: How does the Human Respiratory System maintain homeostasis?

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Aim How does the Human Respiratory System
maintain homeostasis?

• HW 18
• Read Text pages 956 to 963
• Pg.963 section 37-3 ans. ques. 1-5
• Pg.968 ques. 19-22
• Complete sentences, neatness counts

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Respiration can be described

• At the cellular level oxygen is used to break
  down glucose in the production of the high energy
  compound ATP (occurs in the mitochondria of the
  cell)
• Groups formula for aerobic respiration
• At the organ level structures bring air
  containing oxygen into the body where it can be
  transferred to the red blood cells.

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Figure 37-14 The Respiratory System
Trace a molecule of oxygen to a cell in the body
Section 37-3
Pharynx
Nose
Larynx
Trachea
Mouth
Bronchiole
Lung
Epiglottis
Bronchus
Alveoli
Bronchioles
Diaphragm
Capillaries
Edge of pleural membrane
4
Figure 37-15 Gas Exchange in the Lungs
Alveoli
Section 37-3
Bronchiole
Gas exchange occurs by diffusion across the
membrane of an alveolus and a capillary.
Capillary
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Figure 37-16 The Mechanics of Breathing
Section 37-3
Air exhaled
Air inhaled
Rib cage descends
Rib cage rises
Diaphragm
Diaphragm
Inhalation
Exhalation
6
Figure 37-16 The Mechanics of Breathing
Section 37-3
Air exhaled
Air inhaled
Rib cage descends
Rib cage rises
Diaphragm
Diaphragm
Inhalation
Exhalation
7
Smokers lung and healthy lung