Here are the definitions and functions for each numbered part of the respiratory system, written simply for your notes.
1. Respiratory system
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Definition: The group of organs and tissues in your body that help you breathe.
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Function: It brings oxygen into your body and removes carbon dioxide (a waste gas) when you exhale.
2. Nostrils and mouth
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Definition: The openings where air enters your body.
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Function: They act as the doorway for air to get inside. The nose also warms up and cleans the air before it goes deeper into your lungs.
3. Pharynx
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Definition: Also known as the throat; it is a tube behind your nose and mouth.
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Function: It serves as a passageway for both air (going to the lungs) and food (going to the stomach).
4. Larynx
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Definition: Commonly called the voice box.
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Function: It contains your vocal cords, which vibrate to make sound when you speak. It also prevents food from going down the wrong pipe into your lungs.
5. Trachea
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Definition: Also known as the windpipe. It is a strong tube with rings of cartilage to keep it open.
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Function: It carries air from your throat down toward your lungs.
6. Bronchi
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Definition: Two large tubes that branch off from the bottom of the trachea.
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Function: They carry air directly into the left and right lungs.
7. Bronchioles
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Definition: Smaller branches that split off from the bronchi inside the lungs.
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Function: They spread the air out to all the tiny air sacs where gas exchange happens.
8. Lungs
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Definition: Two large, spongy organs located in your chest.
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Function: This is where the main work happens. They take oxygen from the air and put it into your blood, and they take carbon dioxide out of your blood so you can breathe it out.
9. Diaphragm
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Definition: A large, dome-shaped muscle located at the bottom of your chest cavity, under the lungs.
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Function: It is the main muscle for breathing. When it moves down, it pulls air into your lungs (inhale). When it moves up, it pushes air out (exhale).
Final Answer:
1. Respiratory system: The body system responsible for breathing; brings in oxygen and removes carbon dioxide.
2. Nostrils and mouth: Entry points for air; the nose filters and warms the air.
3. Pharynx: The throat; a shared pathway for air and food.
4. Larynx: The voice box; produces sound and protects the airway.
5. Trachea: The windpipe; carries air from the throat to the lungs.
6. Bronchi: Large tubes branching from the trachea into the lungs.
7. Bronchioles: Small tubes inside the lungs that distribute air to air sacs.
8. Lungs: Organs where oxygen enters the blood and carbon dioxide leaves.
9. Diaphragm: The main muscle below the lungs that controls breathing by moving up and down.
Parent Tip: Review the logic above to help your child master the concept of respiratory worksheet.
