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 gassesEffective FiltererDynamic WarmerSuper Humidifier

Structural Plan Figure 14-1 p. 363Respiratory Organs: Nose-olfactory cells for sense of smellLarynx- voice boxPharynx- throatTrachea-windpipeBronchiLungs***Tube with many branches of alveoli****

Alveoli Circulation

capillaries

Alveolar sac

Passive TransportDiffusion: responsible for the gas exchange in

the respiratory system.

Respiratory TractsUpper Respiratory Tract Lower Respiratory Tract

NosePharynxLarynx

TracheaBronchiLungs

Nose

Pharnyx: Throat

Larynx: Voicebox

Trachea: Windpipe

Bronchi, Bronchioles, & AlveoliFigure 14-7, page 370

Cellular RespirationWhen 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 mechanicsInspiration Expiration

Inhalation- moves air into the lungs

Diaphragm: muscles separating the abdomen from thoracic cavity

Exhalation- moves air out of the lungs

Figure 14-11 page 376

Respiratory Quiz for you!

Answers to Quiz1. Alveoli2. Nose3. Larynx4. Bronchi5. Trachea6. Lung