Respiratory System Flashcards
(20 cards)
What is Vital Capacity?
Max volume of air you can breathe at a time
What is the Diaphragm?
Flexible layer of muscle separating the chest and abdomen. Helps you inhale and exhale
What happens when you breathe in?
Diaphragm contracts, pushing downward; Lungs expand and relax; Intercoastal muscles contract; Ribcage expands
What happens when you breathe out?
Diaphragm relaxes, springing back up; Lungs tense and shrink as air gets forced out
What does the Respiratory System include?
Nose, Throat (Pharynx), Larynx, Trachea, Lungs
What is the function of the Nose in the respiratory system?
Breathes in air where it is moistened, warmed and filtered
What do Cilia do?
Protect the nose and filter
What is the Pharynx?
Throat; Where nose and mouth airways meet; carries both food and air
What is the Trachea?
Tube for air
What is the Epiglottis?
Flap of tissue that stops food from going through the trachea
What is the Larynx and where is it located?
Located at the top of the trachea; Contains our vocal chords
What are Bronchi?
The trachea divides into two branches called bronchi
What are Bronchioles?
Smaller tubes that branch from the bronchi and lead to the alveoli
What are Alveoli and how do they work?
Tiny air sacs at the end of bronchioles that are surrounded by capillaries where air and CO2 diffuse through the walls through a membrane
What are the percentages of Oxygen and CO2 when breathing in?
Oxygen: 21%, CO2: 0.04%
What are the percentages of Oxygen and CO2 when breathed out?
Oxygen: 16%, CO2: 4%
What are Intercostal Muscles?
A thin band of muscle between two ribs that helps with breathing
What is the job of Intercostal Muscles?
Helping with breathing
What is Cellular Respiration?
Process by which organisms use oxygen to (break down food to) get and release energy for cell functions
When the intercostal muscles contract
the ribs all move upwards and onwards, creating a larger space within the rib cage. Breathing in
