The human gas exchange system and breathing
I can describe how humans breathe, including the roles of different parts of the gas exchange system.
The human gas exchange system and breathing
I can describe how humans breathe, including the roles of different parts of the gas exchange system.
Lesson details
Key learning points
- The structures and functions of the gas exchange system in humans.
- The mechanism of breathing, including the role of muscles, to move air in and out of the lungs.
- A pressure model to explain the movement of gases during breathing.
Keywords
Gas exchange system - The human gas exchange system is a group of organs that work together to enable us to breathe.
Pressure - The molecules of a gas in a container collide with the walls of the container and this creates pressure.
Volume - The volume of a gas is the amount of 3D space it fills.
Inhalation - Breathing in is called inhalation.
Exhalation - Breathing out is called exhalation.
Common misconception
Thinking that the heart is part of the gas exchange system, linked to the lungs by "air tubes".
This lesson explores the organs that make up the gas exchange system and how air is moved into and out of the lungs,
Content guidance
- Risk assessment required - equipment
Supervision
Adult supervision required
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Which of the following organs is involved in breathing in the human body?
Q2.Match the item to its description.
A group of tissues working together.
A group of organs working together.
A group of similar cells working together.
The building blocks of living organisms.
Q3.Put these in order of complexity, starting with the simplest.
Q4.In which living process is oxygen used to release energy?
Q5. provide support for the human body and hold the body upright.
Q6.Skeletal in the human body contracts and relaxes to move the skeleton.
Assessment exit quiz
6 Questions
Q1.What is the name of the organ system in the body that enables breathing to occur?
Q2.Put the following parts of the gas exchange system in order, to show the path that air takes when it enters the body.
Q3.Which part of the gas exchange system contracts and relaxes to change the volume of the lungs?
Q4.When there is a pressure in the lungs, air will move into the lungs.
Q5.What does the glass bell jar in this model of breathing represent?
