Nature & science · 4th Grade (9-10) · Advanced Body Systems (circulation & Respiration)
How We Breathe – The Mechanics of Respiration
Understand the breathing process and how the respiratory system removes carbon dioxide.
Module
Advanced Body Systems (circulation & Respiration)
Grade
4th Grade (9-10)
Duration
10 min
Questions
5
What's in this exercise
Answers are hidden — sign up to practise and check your work.
Question 1
Multiple choice
Which muscle contracts to pull air into the lungs when you breathe in?
Question 2
Multiple choice
What is the path that air follows from the nose to the lungs?
Question 3
Multiple choice
How many lungs does the human body have?
Question 4
True or false
When you breathe out, your diaphragm relaxes and pushes air out of the lungs.
Question 5
Matching
Match each breathing action to what the body does.
Sign up to let your kid practise these exercises
Get started — it's freeMore exercises in this module
Graph Patterns – Understanding What Heart Rate Data Tells Us
Active Bodies – Why Moving More Means a Healthier Heart
Activity and Your Body – How Exercise Changes Breathing and Heart Rate
Inside the Circulatory System – Blood and Its Pathways
Breathing In – How Lungs Bring Oxygen into the Body
What Blood Carries – Oxygen and Nutrients on the Move