BIO 203
Cellular and Organ
2 K+ 3 Na+
Physiology
ATP ADP + Pi
2 K+ 3 Na+
Respiratory Systems I
Dr. Robert Watson
Neurobiology & Behavior
Stony Brook University
, Learning Objectives
1. Compare and contrast the respiratory surfaces of
aquatic and terrestrial animals
2. Describe the anatomy of mammalian lungs
3. Explain negative pressure breathing
4. Explain the importance of surfactant
,Respiration
1. Cellular Respiration
• Flashback to Lecture 1
• Anaerobic
• Aerobic
2. External Respiration
• The movement of gases (oxygen and
carbon dioxide) between the
external environment and the cells
of the organism.
Fish Gill Lung
Copyright © 2005 Pearson Education Inc. Publishing © 2019 Pearson Education, Inc.
as Pearson Benjamin Cummings. All rights reserved.
, External Respiration
• Major function of external respiration is gas exchange
• Uptake of molecular O2 from environment
• Discharge of CO2 into environment
• Another major function is acid-base balance
• Animals require continuous supply of O2
• Environmental Reservoirs of Oxygen
• Atmosphere is major reservoir (~21% O2)
• Bodies of water also contained dissolved O2
• O2 is not very soluble in water
CA = carbonic anhydras
Cellular and Organ
2 K+ 3 Na+
Physiology
ATP ADP + Pi
2 K+ 3 Na+
Respiratory Systems I
Dr. Robert Watson
Neurobiology & Behavior
Stony Brook University
, Learning Objectives
1. Compare and contrast the respiratory surfaces of
aquatic and terrestrial animals
2. Describe the anatomy of mammalian lungs
3. Explain negative pressure breathing
4. Explain the importance of surfactant
,Respiration
1. Cellular Respiration
• Flashback to Lecture 1
• Anaerobic
• Aerobic
2. External Respiration
• The movement of gases (oxygen and
carbon dioxide) between the
external environment and the cells
of the organism.
Fish Gill Lung
Copyright © 2005 Pearson Education Inc. Publishing © 2019 Pearson Education, Inc.
as Pearson Benjamin Cummings. All rights reserved.
, External Respiration
• Major function of external respiration is gas exchange
• Uptake of molecular O2 from environment
• Discharge of CO2 into environment
• Another major function is acid-base balance
• Animals require continuous supply of O2
• Environmental Reservoirs of Oxygen
• Atmosphere is major reservoir (~21% O2)
• Bodies of water also contained dissolved O2
• O2 is not very soluble in water
CA = carbonic anhydras
