Human Respiratory System Structures

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Presentation transcript:

Human Respiratory System Structures Respiratory System Unit

Lungs -Main organ of the respiratory system.

Diaphragm -Main muscle that controls breathing by changing pressure in the chest cavity when it contracts. https://www.youtube.com/watch?v=hp-gCvW8PRY

Nasal Cavity/Nose -Place where air enters the body; warms, moistens, and filters incoming air.

Mouth -Another place where air enters the body.

Pharynx -Common passageway of your nasal cavity and your mouth.

Epiglottis -Flap that closes over the trachea when swallowing to keep food from “going down the wrong pipe”; remains open when breathing. https://www.youtube.com/watch?v=qrAfEyane2Y

Larynx -“Voice box”; makes sounds as air passes through vocal cords. https://www.youtube.com/watch?v=iYpDwhpILkQ

Trachea -Windpipe; tube leading into the chest cavity.

Bronchi -Branches of the trachea that lead to each lung.

-Smaller branches of the bronchi inside the lungs. Bronchioles -Smaller branches of the bronchi inside the lungs.

Alveoli -“Grapelike”, Tiny, thin walled sacs where oxygen and carbon dioxide are exchanged.

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