Breathing, respiration and gas exchange | Science | Quizalize & Oak National Academy

Starter quiz

What do humans need to breathe in, to stay alive?
- 'Air' ✓
______ is the movement of particles from an area of high concentration to an area of low concentration.
- 'Diffusion' ✓
Which of the following is the place inside a cell where cellular respiration takes place?
- chloroplast
- mitochondria ✓
- nucleus
- vacuole
The human body...
- ...contains a small number of cells.
- ...is made up of many cells. ✓
- ...is one big cell.
- ...only has cells between the organs.
Which of the following is used by the body as a source of energy?
- Fibre
- Water
- Sugar ✓
- Vitamins
Oxygen is transported from the lungs to cells around the body by travelling in the ______.
- 'Blood' ✓

What is in the air we breathe in?
- Just oxygen.
- Just carbon dioxide.
- A mixture of oxygen and carbon dioxide.
- A mixture of oxygen, carbon dioxide and other gases. ✓
What is in the air we breathe out?
- Just oxygen.
- Just carbon dioxide.
- A mixture of oxygen and carbon dioxide.
- A mixture of oxygen, carbon dioxide and other gases. ✓
Which process involves moving air into the lungs?
- Breathing ✓
- Cellular respiration
- Gas exchange
Which process takes place in the mitochondria of cells?
- Breathing
- Cellular respiration ✓
- Gas exchange
Which process involves diffusion of gases between air sacs in the lungs and blood vessels?
- Breathing
- Cellular respiration
- Gas exchange ✓
Which process produces carbon dioxide as a waste product and provides energy for life processes in cells?
- Breathing
- Cellular respiration ✓
- Gas exchange

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Humans and other animals breathe to move air in and out of their lungs.
Cells need oxygen from the air for cellular respiration, to provide energy for life processes.
Cellular respiration produces carbon dioxide as a waste product.
Oxygen needs to be absorbed into, and carbon dioxide needs to be removed from, the human body.
In gas exchange, oxygen diffuses from the lungs into the blood; carbon dioxide diffuses from the blood into the lungs.

Breathing and respiration are the same thing.

This lesson explores the differences between breathing, respiration and gas exchange, including what they are and where they take place.

Breathing - Breathing is the process in which air moves in and out of the lungs.
Lungs - The lungs are a pair of organs found in humans and some other animals.
Cellular respiration - Cellular respiration is a chemical process in cells, which uses sugar as a fuel to provide energy for life processes.
Mitochondria - Subcellular structures, called mitochondria, use sugar and oxygen for cellular respiration.
Gas exchange - 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.