Respiratory System Flashcards
What is the purpose of the respiratory system?
To allow us to breathe, they bring oxygen into our bodies (inhalation) and send carbon dioxide out (exhalation).
Is respiration the same as breathing?
No
What is respiration carried out by?
Cells where they use oxygen and glucose to make energy
What is the function of the nasal cavity?
Behind the nose, keeps nose moist with mucus so you don’t get nose bleeds from dry nose
What is the function of the pharynx?
Also called the throat, is a passageway that extends from the base of the skull to the level sixth veterbra. It receives air from nasal cavity.
What is the function of the lungs?
To help oxygen enter red cells in blood. Red blood cells then carry oxygen around to be used in cells in the body. Also gets rid of carbon dioxide.
What is the function of the bronchus?
Main passageway to lungs, when someone breathes through nose or mouth, air travels through larynx, then trachea which carries air to right and left bronchi.
What is the function of the epiglottis?
A small moveable ‘lid’ just above the larynx that prevents food and drink from entering your windpipe.
What is the function of the trachea?
The windpipe carries oxygen-rich air to the lungs. Also carries carbon dioxide out of your lungs. When you inhale oxygen travels through your nose, through your larynx and down your windpipe
What is the function of the alveoli?
Where the lungs and blood exchange oxygen and carbon dioxide during the process of breathing in and out.
What is the function of the diaphragm?
Located below the lungs, it is a large domed shaped muscle. It contracts rhythmically and mostly involuntary. When inhaling, the diaphragm flattens and the chest cavity enlarges.
What is inhalation?
When you breathe in, ribs move up and down, lungs expand and intercostal muscles contract
What is exhalation?
When we exhale, air moves out, ribs move in and down, lungs go back to normal and intercostal muscles relax.
Where does inhaled oxygen move to?
Moves from alveoli to blood to the capillaries while carbon dioxide moves from blood in capillaries to air in alveoli.
