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Respiratory System Intro

Respiratory System Intro. Objective: SWBAT describe common functions of the respiratory system as well as the basic organs

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Respiratory System Function 1. It provides for oxygen and carbon dioxide exchange between the blood and air. 2. It serves for speech and other vocalizations. 3. It provides the sense of smell, which is important in social interactions, food selection, and avoiding danger. 4. By eliminating carbon dioxide, it helps control the pH of body fluids.

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Page 1: Respiratory System Intro. Objective: SWBAT describe common functions of the respiratory system as well as the basic organs

Respiratory System Intro

Page 2: Respiratory System Intro. Objective: SWBAT describe common functions of the respiratory system as well as the basic organs

Objective: • SWBAT describe common functions of the respiratory system as well

as the basic organs.

Page 3: Respiratory System Intro. Objective: SWBAT describe common functions of the respiratory system as well as the basic organs

Respiratory System Function• 1. It provides for oxygen and carbon dioxide exchange between the

blood and air.• 2. It serves for speech and other vocalizations.• 3. It provides the sense of smell, which is important in social

interactions, food selection, and avoiding danger.• 4. By eliminating carbon dioxide, it helps control the pH of body fluids.

Page 4: Respiratory System Intro. Objective: SWBAT describe common functions of the respiratory system as well as the basic organs

Function Continued5. The lungs carry out a step in the synthesis of a vasoconstrictor called angiotensin II, which helps to regulate blood pressure.6. Breathing creates pressure gradients between the thorax and abdomen that promote the flow of lymph and venous blood7. Taking a deep breath and holding it while contracting the abdominal muscles helps to expel abdominal contents during urination, defecation, and childbirth.

Page 5: Respiratory System Intro. Objective: SWBAT describe common functions of the respiratory system as well as the basic organs

Principal Organs (important ones)• Nose• Pharynx • Larynx• Trachea • Bronchi• Lungs

Page 6: Respiratory System Intro. Objective: SWBAT describe common functions of the respiratory system as well as the basic organs

The flow of oxygen• Within the lungs, air flows along a dead-end pathway consisting

essentially of bronchibronchiolesalveoli.• Incoming air stops in the alveoli, exchanges gases with the

bloodstream across the alveolar wall and then flows back out

Page 7: Respiratory System Intro. Objective: SWBAT describe common functions of the respiratory system as well as the basic organs

Divisions/Zones • The conducting division of the respiratory system consists of those

passages that serve only for airflow, essentially from the nostrils through the bronchioles.

• The respiratory division consists of the alveoli and other distal gas-exchange regions.

• The airway from the nose through the larynx is often called the upper respiratory tract (respiratory organs in the head and neck), and the regions from the trachea through the lungs compose the lower respiratory tract (the respiratory organs of the thorax).

Page 8: Respiratory System Intro. Objective: SWBAT describe common functions of the respiratory system as well as the basic organs

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The Respiratory OrgansConducting zone

• Respiratory passages that carry air to the site of gas exchange

• Filters, humidifies and warms air

Respiratory zone• Site of gas exchange• Composed of

• Respiratory bronchioles• Alveolar ducts• Alveolar sacs

Conducting zone labeled

Page 9: Respiratory System Intro. Objective: SWBAT describe common functions of the respiratory system as well as the basic organs