Professor Tracy Abram, MAIS, BS

Objectives Discuss functions of the respiratory system List major organs of the respiratory system Investigate and analyze internal and external respiration Mechanisms that regulate respiration

Inquiring Minds want to know… What is the function of the respiratory system?

Respiratory System Functions: Distributes air Exchanges gasses Effective Filterer Dynamic Warmer Super Humidifier

Structural Plan Figure 14-1 p. 363 Respiratory Organs: Nose-olfactory cells for sense of smell Larynx- voice box Pharynx- throat Trachea-windpipe Bronchi Lungs ***Tube with many branches of alveoli****

Alveoli Circulation capillaries Alveolar sac

Passive Transport Diffusion: responsible for the gas exchange in the respiratory system.

Respiratory Tracts Upper Respiratory Tract Lower Respiratory Tract Nose Pharynx Larynx Trachea Bronchi Lungs

Nose

Pharnyx: Throat

Larynx: Voicebox

Trachea: Windpipe

Bronchi, Bronchioles, & Alveoli Figure 14-7, page 370

Cellular Respiration When humans breathe, laugh or talk, we release carbon dioxide. This process is called cellular respiration. In cellular respiration, humans take in food and oxygen and release carbon dioxide and water to produce energy. Respiration= C6H12O6 (glucose) + 6O2 (oxygen) > 6CO2 +6H2O + energy

Breathing mechanics Inspiration Expiration Inhalation- moves air into the lungs Diaphragm: muscles separating the abdomen from thoracic cavity Exhalation- moves air out of the lungs Figure page 376

Respiratory Quiz for you!

Answers to Quiz 1. Alveoli 2. Nose 3. Larynx 4. Bronchi 5. Trachea 6. Lung