Biology-B2-The Circulatory System

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  • Created by: tonisha_
  • Created on: 16-06-21 18:13
What are the 4 main chambers of the heart?
Right atrium
Left Atrium
Right ventricle
Left Ventricle
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What are the four main blood vessels?
Vena Cava
Pulmonary Artery
Pulmonary Vein
Aorta
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What is a double circulatory system?
where the blood passes through the heart twice

Right ventricle of body pumps deoxygenated blood from body through to the lungs to become oxygenated
Left ventricle pumps oxygenated blood from lungs through to rest of the body to all body cells
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What type of organisms have a double circulatory system?
All mammals
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What separates the ventricles and atria?
valves
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What is the right valve called?
Tricuspid valve
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What is the left valve called?
bicuspid/mitral valve
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What valves separate the ventricles and blood vessel?
semi lunar valves
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What is the job of these valves?
to prevent the backflow of blood
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What is the job of the vena cava?
to bring deoxygenated blood from the body into the heart
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What is the job of the pulmonary artery?
takes deoxygenated blood to the lungs for gas exchange to take place and for blood to become oxygenated.
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What is the job of the pulmonary vein?
brings in oxygenated blood from the lungs into the heart
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What is the job of the aorta?
takes oxygenated blood away from the heart to the rest of the body
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What is the septum?
separates both sides of the heart
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What is the role of the septum?
prevent the mixture of blood from either side of heart
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What is key about the left side of the heart?
it has thicker muscular tissue
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Why does it have a thicker muscular wall?
the blood on the left side has to be pumped under higher pressure to be sent to the rest of the body.
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What type of tissue is the heart made of?
cardiac muscle tissue
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What is the role of the coronary arteries?
provides oxygenated blood to heart for it to undertake respiration
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Why does the heart need to undertake respiration?
provides energy to the heart for contraction
(allows it to keep pumping) by providing glucose
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What is the first stage of the blood going through the heart?
deoxygenated blood from body enters heart via vena cava
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which side of the heart is this?
the right side
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What is the second stage?
The blood enters the right atrium
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Third stage?
right atrium contracts, tricuspid valve opens and blood is squeezed into the right ventricle
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Fourth stage?
valves close, ventricles contract
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Which blood vessel does the blood leave through and why?
blood exits through the pulmonary artery to go to the lungs to become oxygenated
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Fifth stage?
oxygenated blood enters back into heart through the pulmonary vein
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Sixth stage?
blood is passed into the left atrium
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Seventh stage?
left atrium contracts, bicuspid valve opens and blood passes into left ventricle
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Eighth stage?
valves close, ventricles contract and blood exits through the aorta
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Where does the blood go after this?
to the rest of the body
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KEY INFO
-----------------
BLOOD ENTERING AND EXITING THE HEART FROM BOTH SIDES IS A SIMELTANEOUS PROCESS
:)
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Where does most of the oxygenated blood go?
to the rest of the organs
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Where does some of it go?
to the coronary arteries
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What controls our resting heart rate?
a pacemaker
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What is it and where is it located?
a group of cells
in right atrium
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They produce a small?
electric impulse
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Which spreads to surrounding?
muscle cells
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Causing them to?
contract
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What happens if a patients natural cells dont work?
an artificial pace maker may be used
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Other cards in this set

Card 2

Front

What are the four main blood vessels?

Back

Vena Cava
Pulmonary Artery
Pulmonary Vein
Aorta

Card 3

Front

What is a double circulatory system?

Back

Preview of the front of card 3

Card 4

Front

What type of organisms have a double circulatory system?

Back

Preview of the front of card 4

Card 5

Front

What separates the ventricles and atria?

Back

Preview of the front of card 5
View more cards

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