Transcript L14 The Cardiac Cycle copy 2

Wednesday 20th November
- COPY: Objective
To understand how the cardiac cycle is brought
about
Starter:
On the worksheet ‘The Cardiac
Cycle’ write 2 sentences in
each box using as many
Biological keywords as you
can
5
mins
Now underline or highlight your
keywords and add them up
Outcomes
Literacy - To be able to spell correctly, use, understand and
describe the words systole, diastole, atrio ventricular etc.
•Describe the stages in the Cardiac Cycle (E)
•Explain how valves control the flow of blood through
the heart (D)
•Explain how the pressures in the heart are related to
the different stages in the cycle (C/B)
EXTENSION - Exam Questions
/5
Cardiac Cycle Progress Ladder
A*
I can explain how the pressures in the
heart are related to the different
stages in the cycle
A
B
C
D
I can put the stages of the cardiac
cycle in the correct sequence
E
I can label the main parts of
the heart and describe the
circulation of blood flow
round the body
I can label an
electrocardiograph diagram to
show the heart valves opening
and closing
Highlight where you
think you are at now
I can explain how valves
control the flow of blood
through the heart
I can define systole and
diastole
Using your text books write down
definitions of the following 2 keywords
Systole -
period of ventricular
contraction
Diastole -
period of ventricular
relaxation
NOTE: Normally diastole is longer than systole.
/5
Cardiac Cycle Progress Ladder
A*
I can explain how the pressures in the
heart are related to the different
stages in the cycle
A
B
C
D
I can put the stages of the cardiac
cycle in the correct sequence
E
I can label the main parts of
the heart and describe the
circulation of blood flow
round the body
I can label an
electrocardiograph diagram to
show the heart valves opening
and closing
Highlight where you
think you are at now
I can explain how valves
control the flow of blood
through the heart
I can define systole and
diastole
Card Sort Activity
Put the cards in
the correct order
/5
Cardiac Cycle Progress Ladder
A*
I can explain how the pressures in the
heart are related to the different
stages in the cycle
A
B
C
D
I can put the stages of the cardiac
cycle in the correct sequence
E
I can label the main parts of
the heart and describe the
circulation of blood flow
round the body
I can label an
electrocardiograph diagram to
show the heart valves opening
and closing
Highlight where you
think you are at now
I can explain how valves
control the flow of blood
through the heart
I can define systole and
diastole
Cardiac Cycle - General Principles
Contraction of the myocardium
generates pressure changes which
result in the orderly movement of
blood.
Blood flows from an area of high
pressure to an area of low pressure,
unless flow is blocked by a valve.
Events on the right and left sides of the
heart are the same, but pressures are
lower on the right.
http://www.tes.co.uk/teaching-resource/Anatomy-and-Physiology-ofthe-Heart-6174005/
/5
Cardiac Cycle Progress Ladder
A*
I can explain how the pressures in the
heart are related to the different
stages in the cycle
A
B
C
D
I can put the stages of the cardiac
cycle in the correct sequence
E
I can label the main parts of
the heart and describe the
circulation of blood flow
round the body
I can label an
electrocardiograph diagram to
show the heart valves opening
and closing
Highlight where you
think you are at now
I can explain how valves
control the flow of blood
through the heart
I can define systole and
diastole
Atrial systole
The heart is full of blood and
the ventricles are relaxed
Both the atria contract and
blood passes down to the
ventricles
The atrio-ventricular valves
open due to blood
pressure
70% of the blood flows
passively down to the
ventricles so the atria do
not have to contract a
great amount.
Ventricular systole
The atria relax.
The ventricle walls contract,
forcing the blood out
The pressure of the blood forces
the atrio-ventricular valves to
shut (producing the heart sound
‘lub’)
The pressure of blood opens the
semi-lunar valves.
Blood passes into the aorta and
pulmonary arteries.
Diastole
The ventricles relax
Pressure in the ventricles falls below
that in the arteries
Blood under high pressure in the
arteries causes the semi lunar
valves to shut. This produces the
second heart sound, ‘dub’.
During diastole, all the muscle in the
heart relaxes.
Blood from the vena cava and
pulmonary veins enter the atria.
The whole cycle starts again.
http://www.khanacademy.org/science/healthcare-and-medicine/pressure-volume-loops/v/pressure-in-the-left-heart---part-1
Cardiac cycle - Match the letter on the graph to the
following events
Semi-lunar valves
open
Atrio-ventricular
valves close,
Semi-lunar valves
close
Atrio-ventricular
valves open
/5
Cardiac Cycle Progress Ladder
A*
I can explain how the pressures in the
heart are related to the different
stages in the cycle
A
B
C
D
I can put the stages of the cardiac
cycle in the correct sequence
E
I can label the main parts of
the heart and describe the
circulation of blood flow
round the body
I can label an
electrocardiograph diagram to
show the heart valves opening
and closing
Highlight where you
think you are at now
I can explain how valves
control the flow of blood
through the heart
I can define systole and
diastole
Describing the stages of the cardiac cycle
Now Complete the Cardiac Cycle worksheet again by
describing each stage in each of the diagrams - using
all the keywords you have learnt so far today..
Now underline or highlight your
keywords and add them up
Extension activities - Card sort
Heart Matchmaker cards
/5
Cardiac Cycle Progress Ladder
A*
I can explain how the pressures in the
heart are related to the different
stages in the cycle
A
B
C
D
I can put the stages of the cardiac
cycle in the correct sequence
E
I can label the main parts of
the heart and describe the
circulation of blood flow
round the body
I can label an
electrocardiograph diagram to
show the heart valves opening
and closing
Highlight where you
think you are at now
I can explain how valves
control the flow of blood
through the heart
I can define systole and
diastole
Cardiac Cycle flip-chart
Cut out the different stages in the cardiac cycle.
Arrange the stages so that they are in the correct order.
Staple the end of the pages together to create a flip book.
Use this book to help you remember the cardiac cycle and to
answer practice exam questions!
/5
Cardiac Cycle Progress Ladder
A*
I can explain how the pressures in the
heart are related to the different
stages in the cycle
A
B
C
D
I can put the stages of the cardiac
cycle in the correct sequence
E
I can label the main parts of
the heart and describe the
circulation of blood flow
round the body
I can label an
electrocardiograph diagram to
show the heart valves opening
and closing
Highlight where you
think you are at now
I can explain how valves
control the flow of blood
through the heart
I can define systole and
diastole
You Tube clips to watch
http://www.tes.co.uk/teaching-resource/Anatomy-and-Physiology-of-the-Heart6174005/
http://www.khanacademy.org/science/healthcare-and-medicine/pressure-volume-loops/v/pressure-in-the-left-heart---part-1
References
Glenn Toole, Susan Toole (2008). A2 Biology. Cheltenham: Nelson
Heart Glossary