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

The lungs are a pair of organs found in humans and some other animals.

Cellular respiration is a chemical process in cells, which uses sugar as a fuel to provide energy for life processes.

Subcellular structures, called mitochondria, use sugar and oxygen for cellular respiration.

The process of oxygen diffusing from the lungs to the blood and carbon dioxide diffusing from the blood to the lungs is called gas exchange.

Breathing, respiration and gas exchange

Science

The human gas exchange system and breathing

Estimating lung volume

Adaptations of the human lungs for gas exchange

Cellular respiration

Aerobic cellular respiration

Anaerobic cellular respiration in humans

Anaerobic cellular respiration and fermentation in microorganisms

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

A mixture of oxygen, carbon dioxide and other gases.

Which process involves moving air into the lungs?

Which process takes place in the mitochondria of cells?

Which process involves diffusion of gases between air sacs in the lungs and blood vessels?

Which process produces carbon dioxide as a waste product and provides energy for life processes in cells?

What do humans need to breathe in, to stay alive?

{{}} is the movement of particles from an area of high concentration to an area of low concentration.

Which of the following is the place inside a cell where cellular respiration takes place?

Which of the following is used by the body as a source of energy?

Oxygen is transported from the lungs to cells around the body by travelling in the {{}}.

Breathing, respiration and gas exchange

Lesson outcome