Respiratory System
Ventilation ( breathing)
LO: explain that plants and animals
respire
Compare and contract combustion and
respiration
Recap questions, discuss with your partner
1. How you know something is alive?
2. Why do we breathe?
3. Make a list of things we need energy for?
4. Can you write the word equation for combustion
Fuel + ______
5. Can you write the word equation for respiration
Glucose + __________
Asian fish
market
Which of these organisms respire?
A
D
B
C
ALL OF
E
THEM!
F
Releasing energy from food
• This is called
RESPIRATION
Glucose + oxygen  carbon dioxide + water + ENERGY
This reaction occurs in all living organisms
DEMO: screaming jelly baby
FUEL + OXYGEN
combustion
Carbon
Dioxide
+ Water +
ENERGY
How is combustion similar to respiration and how is it different?
Similar
Different
Breathe in, breath out
Glucose + oxygen  carbon dioxide + water + ENERGY
• So how is breathing different to respiration.
Ribs- protect the chest
Windpipe- carries air to the
chest
Bronchioles- contain alveoli
Diaphragm- muscular sheet
Ventilation (breathing) occurs in the lungs
it allows useful gases to diffuse into blood
and waste gases to be removed
Windpipe- carries air to the chest
Rib muscles – to raise
and lower the ribs
Left Lung
Right lung
Left bronchus
Bronchiolescontain air sacs
called alveoli
Ribs
Heart
Ribs –protect the
chest
Diaphragm- muscular sheet
Are breathing and respiration the same thing???
Breathing is the movement of air in and out of the
lungs.
You can see people breathing and it’s one of the
first things a doctor looks for to see if someone is
alive.
Respiration is a chemical reaction going on inside
all living cells.
It releases energy from glucose to keep the body
alive.
Demonstrating respiration and breathing.
Red
blood
cells
Lungs
Oxygen diffuses into red
blood cells
Pushes
along
Gives out
carbon dioxide
Takes in
oxygen
Cells
Left hand
side of heart
Right hand
side of heart
Pushes
along
“Double Loop” System
BREATHING
Head
Lungs
When the lungs takes in
oxygen that is needed for
respiration and takes out
carbon dioxide gas
RESPIRATION
Right side - Heart - Left side
Cells of the
body
Oxygen is taken in by the
cells of the body and the
head and is combined
with glucose to transfer
energy to something
useful for the body e.g.
movement
Role play questions
• What does the blood carry from the lungs to
the cells?
• What does the blood carry from the cells to
the lungs?
• Where does breathing occur in this roleplay?
• Where does respiration occur?
Fish Head Video
• Explain with reasons whether the fish is
dead or alive
• Are the gills moving?
• If the fish is not breathing, why is it still
moving?
• When would you determine when a
person/animal is dead?
Not sure
AMBER
Breathing
Respiration
RED
GREEN
• This occurs in both plants and animals?
• The lungs are the organs used for this?
Not sure
AMBER
Breathing
Respiration
RED
GREEN
• When you exercise this will be increased?
• The amount of glucose available in the body controls
the rate of which process?
Not sure
AMBER
Breathing
Respiration
RED
GREEN
• This process brings oxygen into the body?
• This is the process where oxygen is used to produce
energy?
Not sure
AMBER
Breathing
Respiration
RED
GREEN
• The amount of glucose available in the body controls
the rate of which process?
• Which of these two processes is a form of excretion for
the body?
Not sure
AMBER
Breathing
Respiration
RED
GREEN
• This is the process where oxygen is used to produce
energy?
• During which process is carbon dioxide produced?
8B Respiration – the truth, and quite few lies
True or false?
1. Respiration means breathing.
FALSE
2. Respiration occurs in all body cells.
TRUE
3. Respiration gives out oxygen.
FALSE
4. Carbon dioxide is used up by respiration.
FALSE
5. Respiration is a chemical process that releases
energy.
TRUE
6. Plants do not respire.
FALSE
8B Respiration – the truth, and quite few lies
True or false?
1. Respiration releases energy from glucose.
TRUE
2. Oxygen is needed for respiration in humans.
TRUE
3. We die without oxygen because we cannot
respire.
TRUE
4. Respiration is a bit like burning.
TRUE
5. People do not respire while they are asleep.
FALSE
6. The more energy we need, the less we respire.
FALSE
8B Respiration and combustion
Respiration and combustion - same thing? Or not?
Are these statements...
…only true about respiration? (R)
…only true about combustion? (C)
…true about respiration and combustion (R & C)
Needs a high temperature
Gives out light
Happens at room temperature
Gives out heat
Needs enzymes to work properly
Uses oxygen
Gives out carbon dioxide
(C)
(C)
(R)
(R & C)
(R)
(R & C)
(R & C)
LUNGS
CELLS
Right side
of heart
Left side
of heart