Transcript Year 8 Repiration lesson 2 Heart and circulation

Do now!
Can you continue
the questions you
started yesterday
(on pages
16 and 17)
Today’s lesson
• Know how blood is transported around the
body.
• Know what system the heart and blood
vessels belong to.
• Know why the heart has two valves
• Know what the different blood vessels in
the body are.
Last lesson - Aerobic Respiration
Occurs in the cytoplasm of cells
Glucose + oxygen
Reactants
carbon dioxide + water (+ energy)
products
The same reaction as burning, but there’s no flame
because the reaction is carefully controlled (slower)
Blood
Oxygen and digested food travel around
the body in blood.
The blood travels around the body in tubes
called blood vessels.
Blood vessels
There are three main types of blood
vessels
Blood vessels
capillaries – The smallest vessels with thin
walls that allow small molecules like
oxygen and glucose to pass through them
Blood vessels
arteries – Thick walled tube which carry
blood from the heart to the body
Blood vessels
veins – Thinner walled tubes which carry
blood back to the heart.
The heart
(from the
rest of
the body)
(to the rest of the body)
The heart
(to the lungs)
(from the lungs)
BBC - GCSE Bitesize Physical Education |
Anatomy and physiology |
The passage of blood
through the heart
The circulatory system
The circulatory system is made up of the
heart and all the blood vessels
The circulatory system
Blood goes from the
heart to the lungs (to
pick up oxygen), it
returns to the heart
where it is then
pumped around the
rest of the body. It
returns to the heart
and the process
starts again.
Sheets
Can you complete the two sheets “The
circulatory system” and “Blood and
circulation”
How fit are you?
• In pairs one of you is going to run on the
spot for 2 minutes
• You will then measure your heart rate over
a period of 10 minutes
Fit?
Time YOU
(mins) # beats in 20
secs
0
1
2
3
4
5
6
7
8
9
10
YOU
Heart rate
(per min)
PARTNER
# beats in 20
secs
PARTNER
Heart rate
(per min)
How to measure pulse
• Check your pulse at your wrist.
• Use two fingers - your index and middle.
• Count how many beats in 20 seconds and
multiply that number by three to get your
heart rate.
• Graph
• Conclusion: Two sentences describing
what you have discovered
Can you gather around Mr
Porter?
Lung capacity
• Measure your lung capacity three times
and calculate the average result
• Design a table of results to find the lung
capacity of ten people in the class
• Find the average lung capacity in the class
• Plot an appropriate graph