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Respiratory System & Gas Exchange. Lungs Central Organ of the Respiratory System 2 compartments connect outside environment through the trachea Keeps.

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Presentation on theme: "Respiratory System & Gas Exchange. Lungs Central Organ of the Respiratory System 2 compartments connect outside environment through the trachea Keeps."— Presentation transcript:

1 Respiratory System & Gas Exchange

2 Lungs Central Organ of the Respiratory System 2 compartments connect outside environment through the trachea Keeps external air separate from internal environment

3 Alveoli Tiny air sacs in the lungs Increase surface area of lungs Surrounded by capillaries Responsible for GAS exchange

4 Oxygen Once O 2 is absorbed into the blood, it binds to Hemoglobin Hemoglobin –Protein found in Red Blood Cells –Delivers oxygen to body

5 Breathing Process 1.Air passes through nose -Moistened -Warmed -Cleaned 2.Pharynx 3.Larynx 4.Trachea 5.Bronchial tubes - One in each lung

6 Breathing Process 6.Bronchioles 7.Alveoli 8.Oxygen diffuses across alveolar membranes (thin walls) into capillaries 9.CO 2 diffuses from capillaries into alveoli

7

8 Circulatory/Respiratory System Cooperation Allow oxygen to enter the blood/body without jeopardizing the health of the cells Keeps deep body cells away (safe) from external environment

9 Feedback Systems Necessary to retain Homeostasis Involve all 3 systems discussed –Respiratory –Circulatory –Nervous

10 F.S. Example Breathing Rate During Exercise 1.Processes in body speed up 2.Production of CO 2 increases 3.CO 2 causes the blood to become more acidic

11 F.S. Example Breathing Rate During Exercise 4.Nerve cells detect acidity 5.Cells send signal to respiratory centers of the brain 6.Respiratory centers respond by stimulating the diaphragm and rib muscles to contract more rapidly

12 F.S. Example Breathing Rate During Exercise 7.Breathing rate is increased 8.Increases rate O 2 brought into body and the rate at which CO 2 is released 9.Blood becomes less acidic

13 F.S. Example Breathing Rate During Exercise 10.Sensory receptors detect pH change 11.Info is relayed to respiratory centers in the brain 12.Brain signals diaphragm and rib muscles to slow contraction

14 F.S. Example Automatic response –You dont have to think about your breathing rate! Regulates the acidity of the blood!


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