Respiration & Blood
The reaction that keeps every cell alive, and the system that supplies it.
What this lesson covers
Respiration & Blood is a 10-part Class 8 Science lesson. Each part makes one point and then hands over to the next, so it can be read in a sitting or picked up again at the part you stopped on. It defines the idea in plain words before using it, works through an example step by step, breaks the topic into its parts and compares them, shows where it is used outside the textbook, names the mistakes that cost marks in an exam, ends with a recap of what to remember.
How it begins
Respiration is the chemical reaction in every living cell that releases energy from glucose. glucose + oxygen → carbon dioxide + water (+ energy). It is not the same thing as breathing, breathing merely supplies the oxygen.
The 10 parts
- What respiration is
- Respiration is not breathing
- Anaerobic respiration
- What blood is made of
- Blood vessels
- The double circulation
- Gas exchange in the lungs
- Where marks go
- What to remember
- Watch one worked through
Practise Respiration & Blood
Everything on QuizByt for Class 8 Science that goes with this lesson: read it first, then test yourself while it is fresh.
🧠 5 quizzes on Respiration & Blood (2 easy, 2 medium, 1 hard)
Work up from easy to hard: the hard quiz asks the Class 8 exam-style questions on Respiration & Blood.
🖨️ Printable worksheet
Respiration & Blood on paper for Class 8, with room to write the working out. Preview the first page free.
🎮 Games for Class 8 Science
Memory and reasoning games at the right level for Class 8. Passing a quiz on Respiration & Blood earns the credits that open them.
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