B5 - the heart

B5 section on heart for ocr gateway b biology. everything you need to know in question and answer form!

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Blood from the lung goes to what vein?
Pulmonary vein
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Blood from the body goes to which vein?
vena carvae
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Describe the cardiac cycle
blood comes in from the body and lugs then enters the atriums which then fill the ventricles with blood. They then contract forcing the blood back out through the aorta and pulmonary vein.
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What type of circulatory system do insects have?
open circulatory system - flows slowly (under little pressure) and cant control the distribution well
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What did Galen think?
the heart and liver produce blood. blood flows back and forth.
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What did Harvey think?
blood moves in a circuit (disagreed with Galen). Disproved that blood moved back and forwards as have valves.
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Name 3 parts of the heart (electrical)
SAN (sinoatrial node) AVN (antiventricular node) and special muscle fibres.
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Describe the coordination of the heart - in one beat
Electrical impulse in SAN - atria contract - impulse reaches AVN - specialised muscle tissue - heart apex - ventricle walls - contract - blood to arteries......again!
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What is an electrocardiogram?
The EGC GRAPH
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What are the 4 types of heat disease?
Valve damage, Hole in the heart, CHD, irregular heartbeat
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What are the cures of heart damage?
transplant, bypass surgery, valve replacement, pacemaker, assist devices
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Advantages of valve replacement over transplant of heart.
less drastic, less infection risk, better chance of success, less rejection issues
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Other cards in this set

Card 2

Front

Blood from the body goes to which vein?

Back

vena carvae

Card 3

Front

Describe the cardiac cycle

Back

Preview of the front of card 3

Card 4

Front

What type of circulatory system do insects have?

Back

Preview of the front of card 4

Card 5

Front

What did Galen think?

Back

Preview of the front of card 5
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Comments

Cheryl_101

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Great help, thank you!

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