10 Questions
What is the primary function of the respiratory system?
To facilitate the exchange of gases between the air and the blood, and between the blood and the body's cells
What is the process called where oxygen is exchanged for carbon dioxide waste inside the lungs?
External respiration
What happens to the lungs and air pressure during normal exhalation?
The lungs become smaller and the air pressure rises, causing air to be expelled
What is the name of the microscopic sacs in the lungs where the gas exchange process takes place?
Alveoli
How does oxygen get transported through the bloodstream?
Oxygen binds to hemoglobin molecules in red blood cells
What is the function of the upper respiratory system?
Trap foreign particles before air reaches the lungs
Where does oxygen diffuse to from the red blood cells at the narrow capillaries?
Into body tissues
What happens to deoxygenated blood in the respiratory system after carrying carbon dioxide back to the lungs?
It is expelled through exhalation
Which process involves red blood cells carrying oxygen absorbed from the lungs around the body?
Internal respiration
Where does carbon dioxide diffuse from during internal respiration?
Tissues into red blood cells
Test your knowledge on the key functions of the respiratory system such as aiding in breathing, facilitating gas exchange, smelling, and sound production. Explore how air is inhaled through the nasal and oral cavities during pulmonary ventilation.
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