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You learn how the body takes in oxygen and removes carbon dioxide during breathing. This matters because living things need respiration to release energy for movement, growth, and other body activities.
You should already know that humans breathe using the chest and lungs. It also helps if you can name common gases in air.
Not confident yet? Work through The digestive system first.
One question from this skill's own question bank, shown with its full working.
Which gas do we take in when we breathe in?
Working: We breathe in air rich in oxygen, which the body needs for respiration.
This topic normally appears in Junior High School science under the human body and health strand, where learners study how body systems work together. It also supports preparation for BECE questions on breathing, respiration, and gaseous exchange.
Curriculum notes are a general guide to where this work normally sits. Always check the syllabus your school or examination body is currently using.
Other JHS The Human Body & Health skills in Science, at the same point in the course.
6 questions with a worked answer after every attempt, and a SmartScore that tracks how close you are to mastery.