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Summary - Pathophysiology of Heart and Circulation
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Summary of Pathophysiology of Heart and Circulation, all lectures 1 to 11.
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* RECAP : 21 Cardiac EnergeticsPart 1 :
Arrangement oft CV System
1.
Why is the CV system sophisticated?
Be there are lots of tissues w/ various demands
. What
b functions oft CV
are the
system ?
The CV transports Of
system : 1 .
.
2 removes waste products
The CV system consist of
2 blood circulations : 1. The
Systemic circulation , the circulation in the whole body
circulation
.
2
Pulmonary
.
2 What is the difference blu the 2 circulations ?
In the there's high O2 Levels BUT low pressure before entering the heart After the heart the blood goes through the systemic circulation
pulmonary circulation
·
.
,
,
In the systemic circulation the pressure is
high But the O levels depends on O reaches the heart again after going through the systemic circulatio
are low It the
activity level on how much
·
,
,
Typically
W
, after the
systemic circulation the O drops to 40
mmitg (from 100 mmHg) ,
which goes into the
pulmonar
BUT upon O2 drops
·
the
exercising even more
(-15mmHg)
b is the pressure in the circulation low ?
.
Why pulmonary
When the blood enters the LA from the pulmonary pressure is ONLY
circulation ,
the
&mmHg
Due to the heart (so after entering) ,
the pressure is increased to 120
mmHg , The blood then enters the
systemic circulation which
, drops the pressure again when the blood reaches the hea
* So in the
pulmonary circulation O2 is
high But the pressure is Low :
Due to the Low lot of O, can be taken up i transported to the systemic circulation where the pressure is high
.
,
pressure ,
a
3
. How is CV system arranged in the body ?
1. The 2 pumps (left is right side ot heart) are in Series ·
Output of BOTH sides olt heart do closely match
.
2 Most major organs are in parallel ,
this enables adaptations to specific needs in blood flow ,
wo
affecting blood flow in other organs.
Ex :
for energetic needs . The sheletal muscle needs a lot of
energy ,
do the blood flow to the muscle will be enhanced while to ,
the other
organs .
reduced
Unlike humans w/ a H-chambered heart ,
a crocodile heart has 3 .
5 chambers
.
.
4 What adaptations occur in a crocodile's heart ?
They change their heart upon behavior , Below water at rest its heart , frequency is 2-5 beato peri run is it can
stay under water for up to 2 his if it wants to be it lowers its metabolism
So while under water its heart does
, , NOT use the pulmonary circulation , Instead ,
the blood is shunt from the left to the right side ol heart the ,
which is enough for its survival under water
.
·
So it has a heart
. at It to a 5 chambered heart
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