Search for notes by fellow students, in your own course and all over the country.
Browse our notes for titles which look like what you need, you can preview any of the notes via a sample of the contents. After you're happy these are the notes you're after simply pop them into your shopping cart.
Title: A level Biology The Cardiac Cycle
Description: power point on the cardiac cycle at a level standard
Description: power point on the cardiac cycle at a level standard
Document Preview
Extracts from the notes are below, to see the PDF you'll receive please use the links above
1
...
At this time the av
valve is open and sl
valve is closed
b
...
This increases the volume of
blood in the LV
d
...
Wall of left atrium stops
contracting (atrial diastole)
and pressure falls
4
6
a
e
f
a
e
b ab 5 6
3
...
This raises the
pressure in the LV
b
...
This corresponds to QRS wave
on an ECG
c
b
e
...
Blood flows from the LV into the
aorta
g
...
4
...
a
...
Ventricular diastole is represented
by a T wave on an ECG
5
...
g
dc
d
...
When pressure in the LA
exceeds that in the LV, the av
valve opens and blood moves
from the LA to the LV
Cardiac cycle
(events on left side only –events on the right are the same but pressures
generated are less because blood is pumped a shorter distance
• 1
...
At this time the av valve is open and sl valve is
closed
– b
...
This increases the volume of blood in the LV
– d
...
Wall of left atrium stops contracting (atrial
diastole) and pressure falls
• 3
...
This raises the pressure in the LV
– b
...
This corresponds to QRS wave on an ECG
Cardiac cycle
(events on left side only –events on the right are the same but pressures
generated are less because blood is pumped a shorter distance
– d
...
When the pressure in the LV exceeds that of the
aorta, the sl valve opens
– f
...
This causes the ventricular volume to fall and
pressure in the aorta to rise
...
Wall of left ventricle stops contracting
(ventricular diastole) and pressure falls
...
Immediately pressure in LV falls below that of
the aorta and the sl valve closes to prevent flow of
blood from the aorta back into the LV
(corresponds to dub sound)
– b
...
All this time, blood has been entering the
LA from the pulmonary vein causing pressure
in the LA to rise slowly
...
When pressure in the LA exceeds that in the
LV, the av valve opens and blood moves from
the LA to
Title: A level Biology The Cardiac Cycle
Description: power point on the cardiac cycle at a level standard
Description: power point on the cardiac cycle at a level standard