A cell is the smallest living building block of an organism.

Cellular respiration is a chemical process that uses glucose, from food, as a fuel to provide energy for life processes.

Glucose is a sugar that our cells use as fuel for cellular respiration.

Breathing is the process in which air is moved in and out of the lungs.

Mitochondria are cell organelles in which cellular respiration takes place in animals and plants.

Cellular respiration

Science

Pupils will learn how producers make glucose using photosynthesis, which is used to make biomass and as a fuel for cellular respiration.

Pupils learned how food is broken down to release useful substances such as sugar.

This unit explores the human gas exchange system, breathing mechanisms, and adaptations for function. It covers aerobic and anaerobic respiration, including fermentation, and compares their processes and implications. Focus is on accuracy, reliable measurements, and SI units.

Breathing and respiration

Common life processes require energy from respiration. Which processes take place in **all** living organisms?

What of these are reactants of cellular respiration?

is where respiration takes place in plants and animals.

is where respiration takes place in bacteria.

Complete the sentence by matching the location to its description.

When does cellular respiration take place?

**Alex:** "Breathing is the same as cellular respiration."

**Laura:** "Cellular respiration is how the lungs take in oxygen from the air."

**Sam:** "Cellular respiration is a chemical reaction that happens in cells."

**Jun:** "Cellular respiration provides living things with oxygen and glucose."

Starting with the smallest put these in size order.

Which gas do humans need from the air that we breathe in?

Where in the human body does gas exchange take place?

Order the path of air entering the lungs.

This causes air to move out of the lungs.

True or false? Humans obtain glucose for respiration by eating carbohydrates.

Starter Quiz