Parts

Structure and Function

Nasal Cavity

passages are covered by thick mucous membranes that contain cilia,

which trap and sweep dust particles to nostrils

Pharynx

where the nasal cavity and mouth's airways meet, from that point

there are two passages that go downward one for air, the other for food

Larynx

include mucous membranes called vocal cords that when are open, air

passes through the larynx without vibrating the vocal cords

Trachea

an open tube of elastic tissue and muscle, extends downward from the base of the larynx

and breaks down into two Bronchi, each one serving a lung

Bronchi

divide as they enter the lungs into smaller branches; the entire network is known as

the bronchial tree

Lungs

where the blood gets rid of Carbon Dioxide and receives oxygen from alveoli and cappilaries

Epiglottis

when someone is swallowing food, the epiglottis cover the trachea

Bronchioles

formed when the bronchi branch out; branch out into microscopic tubules that eventually expand into thousands of thin walled sacs called alveoli

Alveoli

thin-walled sacs of the lungs where oxygen and carbon dioxide are exchanged by diffusion between the air and blood