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How is carbon dioxide expelled from the body?
Carbon dioxide is expelled from the body through the process of exhalation, where it is released through our nose or mouth.
What is carbon dioxide in the respiratory system?
Carbon dioxide is a waste gas produced by our cells.
What pumps oxygen-rich blood to all parts of the body?
The heart pumps oxygen-rich blood to all parts of the body.
What attaches to red blood cells in the respiratory system?
Oxygen from the air attaches to red blood cells in the respiratory system.
Where does the exchange of oxygen and carbon dioxide occur?
The exchange of oxygen and carbon dioxide occurs in the alveoli.
How does air enter the respiratory system?
Air enters the respiratory system through the nose.
What happens to the diaphragm and rib muscles when we breathe out?
When we breathe out, the diaphragm moves upward, and the rib muscles relax, pushing the air out of our lungs.
What happens to the rib muscles when we breathe in?
The rib muscles expand our chest when we breathe in.
Which muscle below our lungs moves downward when we breathe in?
The diaphragm, which is a muscle below our lungs, moves downward when we breathe in.
Where does the exchange of oxygen and carbon dioxide take place?
The exchange of oxygen and carbon dioxide takes place in the alveoli.
What surrounds the alveoli in the lungs?
The alveoli are surrounded by blood vessels called capillaries.
What are the small air sacs called that are located at the end of bronchioles?
Alveoli
What do bronchioles lead to in the respiratory system?
Bronchioles lead to the alveoli in the respiratory system.
What are the two smaller tubes that the trachea branches into?
Bronchi
What is the tube known as that carries air from the nose to the lungs?
The tube known as the trachea carries air from the nose to the lungs.
What is the sticky substance in the nose that helps filter out particles?
The sticky substance in the nose that helps filter out particles is called mucus.
What are the tiny hairs in the nose called?
The tiny hairs in the nose are called cilia.
What are the two openings in our nose called?
The two openings in our nose are called nostrils.
What is the purpose of the nose in the respiratory system?
The nose serves as the entry point for air to enter our respiratory system.
What is the main function of the respiratory system?
The main function of the respiratory system is to help us breathe by bringing oxygen into our bodies and removing carbon dioxide.


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