Respiration

Learning Objectives: To understand how the role of the human

respiratory system links to cellular respiration. To know the reactants and products of

respiration. To perform a test for a product of respiration.

Gas ExchangeAir breathed in Air breathed out

79% 79%

21% 18%0.03%

3%

The body needs a constant supply of energy which comes from digested food.

Glucose from digested carbohydrate is an important substance that contains stored chemical energy .

How is digested food used by the body?

When glucose reacts with oxygen a lot of energy is released.

The release of energy from glucose is called…

In the body’s cells, glucose and oxygen react to release energy . Some of this is released as heat and the rest is used by the cells.

respiration

from the digestive system

from the breathing

system

useful!useful!waste product exhaled

waste product exhaled

This type of respiration is called aerobic respiration because energy is released with oxygen.

Respiration is the process that the body uses to release energy from digested food (glucose):

What is respiration?

carbondioxideglucose oxygen water energy

How do the glucose and oxygen needed for aerobic respiration get to the all the body’s cells?

Aerobic respiration: word equation activity

Growing Yeast

• Blow up a balloon with yeast

• As the yeast is respiring it is releasing Carbon Dioxide

Test your breath for Carbon Dioxide

8B Energy words

Match the word to its correct meaning:

1 respiration 2 oxygen  3 carbon dioxide  4 water

5 energy

6 transport systems

A is a poisonous by-product of respiration. B take materials to and from respiring cells.

C is needed to release energy from glucose in the body.

D the process that releases energy from food.

E is made when energy is released from food.

F is needed to do anything.

D the process that releases energy from food.

C is needed to release energy from glucose in the body. 

A is a poisonous by-product of respiration. E is made when energy is released from food.

F is needed to do anything.

B take materials to and from respiring cells.

8B Respiration – the truth, and quite few lies

True or false?

1. Respiration means breathing.

2. Respiration occurs in all body cells.

3. Respiration gives out oxygen.

4. Carbon dioxide is used up by respiration.

5. Respiration is a chemical process that releases energy.

6. Plants do not respire.

FALSE

TRUE

FALSE

FALSE

TRUE

FALSE

8B Respiration – the truth, and quite few lies

True or false?

1. Respiration releases energy from glucose.

2. Oxygen is needed for respiration in humans.

3. We die without oxygen because we cannot respire.

4. Respiration is a bit like burning.

5. People do not respire while they are asleep.

6. The more energy we need, the less we respire.

TRUE

TRUE

TRUE

TRUE

FALSE

FALSE

Respiration

Learning Objectives:

To understand how the role of the human respiratory system links to cellular respiration.

To know the reactants and products of respiration.

To perform a test for a product of respiration.