Basic Facts
This gas is excreted by the lungs during breathing.
What is carbon dioxide (CO₂)?
The lungs excrete waste in this state of matter.
What is gas?
These two organs are the primary structures of the respiratory system.
What are the lungs?
The process of breathing out is called this.
What is exhalation?
True or False: The lungs excrete oxygen.
What is false?
This muscle below the lungs contracts during inhalation.
What is the diaphragm?
The lungs remove this waste product formed during cellular respiration.
What is carbon dioxide?
The process by which gases move from high to low concentration in the lungs.
What is diffusion?
These tiny air sacs in the lungs are the sites of gas exchange.
What are alveoli?
Lungs are part of this body system.
What is the respiratory system?
Oxygen moves into the blood, and CO₂ moves out during this process.
What is gas exchange?
The tube that connects the throat to the lungs is called this.
What is the trachea?
Lungs help maintain this internal condition by removing CO₂.
What is homeostasis?
This is the name of the small air sacs in the lungs where gas exchange occurs.
What are alveoli?
These two branches from the trachea lead into each lung.
What are the bronchi?