Respiratory systemRespiratory system

Respiratory SystemRespiratory System

• Function: Bringing Oxygen into the body, and removing carbon dioxide and water vapor.

Respiratory SystemRespiratory System

• What gases are in our atmosphere?

78% Nitrogen21% Oxygen1% Argon

Respiratory SystemRespiratory System• What is the job of the

nose?: • Cilia (small hairs) filter out

dirt• Moistens and warms the air

you breathe

This tissue lines the trachea and upper This tissue lines the trachea and upper respiratory tract, and is responsible for respiratory tract, and is responsible for

sweeping debris out of your lungs, up your sweeping debris out of your lungs, up your wind pipe, and into the back of your throat wind pipe, and into the back of your throat

where you’ll either a) cough it out or b) where you’ll either a) cough it out or b) swallow it.swallow it.

Respiratory SystemRespiratory System

Pharynx• Part of both

respiratory & digestive systems

• Aids in swallowing

• Houses the tonsils

TonsilsTonsils

EpiglottisEpiglottis

LarynxLarynx• Generates

sound• Contains

vocal chords • Open for

singing, closed for talking

• vocal chords video

TracheaTrachea

TracheotomyTracheotomy

Bronchi/bronchiolesBronchi/bronchioles

Smallest Part of Lung= Smallest Part of Lung= AlveoliAlveoli

• Alveoli: air sacks where gas is exchanged• Surface area of a tennis court

Nose, pharynx, larynx, Nose, pharynx, larynx,

trachea, bronchi, trachea, bronchi,

bronchioles, lungsbronchioles, lungs

NosePharynx

Trachea

Larynx

LungBronchi

Bronchioles

Respiratory SystemRespiratory System

• Diaphragm:oDome

shaped muscle

oLocated at base of rib cage

Respiratory SystemRespiratory System

• Inhalation:oRib muscles and

diaphragm contractoRib cage expandso Lung volume

increasesoAir pressure in

lungs decreasesoAir flows into lungs

Respiratory SystemRespiratory System

• Exhalation:oRib

muscles/diaphragm relax

oRib cage becomes smaller

oAir pressure in lungs increases

oAir flows out of lungs

Oxygen and Carbon Oxygen and Carbon Dioxide Dioxide

• Exchanged in the lungs through: Diffusion

• The process by which materials move from an area of:oHigh concentration to an area of low concentration

AsthmaAsthma

Lung CancerLung Cancer

Non-smoker vs. Non-smoker vs. smokersmoker

http://www.youtube.com/watch?v=yskYG-EVlBY