HHS Respiratory System

Nasal Cavity

main entry for air that filters, warms, & humidifies air as it enters the body through the nose & goes to the lungs

Oral Cavity

2nd entry for air during high intensity exercise or if the nose is blocked that DOES NOT filter, humidify, or warm air on its way to the lungs

Epiglottis

small flap of connective tissue that prevents food & liquid from entering the trachea

Right Lung

3 lobes (upper lobe, middle lobe, & lower lobe), largest lung that facilitates gas exchange of taking in oxygen & releasing carbon dioxide, blood oxygenation, waste removal, & protection 

Diaphragm

primary muscle responsible for respiration by contracting to pull down the lungs during inhalation & relaxing during exhalation, changes air pressure in the lungs

Alveoli

facilitate gas exchange through the lungs & bloods to exchange oxygen & carbon dioxide during respiration

Bronchioles

small airway that delivers oxygen to the alveoli for gas exchange 

Bronchi

carry oxygen to and from the lungs

Left Lung

2 lobes (upper & lower lobes), facilitate gas exchange, filter air, regulate pH, & structure 

Trachea

primary passageway for air to travel between lungs & the naval/oral cavity, mucus membrane traps dust particles & moistens/humidifies air 

Larynx

facilitates breathing, creates vocal sounds, & prevents food/foreign particles from entering the airway

Pharynx

passageway for air & food

Sphenoidal Sinus

helps to humidify & warm air, trap & flushes out germs

Nasal Cavity (pic)

Oral Cavity (pic)

Frontal Sinus (pic)

Sphenoidal Sinus(pic)

Pharynx (pic)

Epiglottis (pic)

Larynx (pic)

Trachea (pic)

Cartilage/Trachilage Rings (pic)

Right Lung (pic)

Bronchus (pic)

Bronchioles (pic)

Alveoli (pic)

Left Lung (pic)

Diaphragm (pic)

Order of Air Flow during INHALATION

1) Nasal Cavity/Oral Cavity

2) Pharynx

3) Epiglottis

4) Larynx

5) Trachea

6) Bronchi

7) Bronchioles

8) Alveoli

Order of Air Flow during EXHALATION

1) Alveoli

2) Bronchioles

3) Bronchi

4) Trachea

5) Larynx

6) Epiglottis

7) Pharynx

8) Nasal/Oral Cavity