Respiratory System Flashcards
What is the function of the respiratory system?
To move air in and out of the body in order to facilitate the exchange of oxygen and carbon dioxide.
What does the respiratory system consist of?
Nasal passages, pharynx, larynx, trachea, bronchial tubes, lungs, and diaphragm.
What to bronchial tubes branch into?
Bronchioles
Explain alveoli…
They are tiny sacs inside the lungs where gas exchange takes place.
What reduces the pressure in the lungs?
When the diaphragm contracts, the volume of the chest increases.
When air is inhaled through the nose or mouth, what does it pass through to get to the lungs?
It passes through the pharynx, larynx, trachea, and bronchial tubes.
When the diaphragm relaxes, what changes happen to the chest cavity and lungs?
The volume of the chest cavity decreases, forcing the air out of the lungs.
How do the conductive zone and respiratory zone work together?
The conductive zone brings inhaled air to the respiratory zone where gas exchange occurs.
What is external respiration?
It is the exchange of gas between the lungs and the blood.
What is internal respiratory?
It is the exchange of gas between the blood and tissues.
What are some secondary functions of the respiratory system?
pH regulation of the blood, thermoregulation, odor detection, and the production of speech
What is Gas exchange?
It is the loading of the oxygen into pulmonary blood, and the removal of carbon dioxide.
