Respiratory System & Tobacco Flashcards
What is the diaphragm?
The muscle that separates the chest & abdominal cavities
What is respiration?
The exchange of gases between your body & your environment
What are lungs divided into?
Sections called Lobes
What are bronchioles?
Airways that lead into the lungs divide & subdivide to from a network of tubes called bronchioles
What are alveoli?
A cluster of thin walled air sacs at the end of each bronchiole- these are covered by capillaries that allow the exchange of oxygen & carbon dioxide
Where does air enter the body through?
The nose & mouth
Where does air entering the mouth go to?
Directly to the lungs
What happens to air that enters the nose?
It is moistened & warmed by mucous membranes
What are cilia?
Tiny hairs that help filter out dust, pollen etc.
What is the pharynx?
Muscular passageway about 5” long that serves as a common passageway for both food & air (throat)
What is the larynx?
Contains 2 fibrous sheets of tissue known as vocal cords. These cords vibrate to produce sound (voice box)
What is the epiglottis?
Protects the opening of the larynx & at rest it allows air to pass into the lungs
What does the epiglottis do when you swallow?
Closes to prevent food & liquid from being inhaled
What is the trachea?
About 4” long also lined with mucous membranes and cilia. These beat upward opposite the direction of air flow
What are bronchi?
The airways that connect the trachea to the lungs. These divide into smaller branches called bronchioles
