Biology

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  • Created by: gitaxx
  • Created on: 17-04-16 12:09
The heart's structure has four chambers with one way flaps called?
Valves
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The atria relaxation- blood enters the atria from the pulmonary veins or vena cava.
Atrial diastole
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These are the upper chambers and they receive blood that is being returned to the heart.
Atria
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This receives blood with little oxygen because blood has already circulated throughout the body delivering oxygen and nutrients.
Right atrium
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This sends an electrical impulse to the atria.
Sinoatrial node
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Atrial contraction- blood is pumped into the ventricles.
Atrial systole
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Through this, the electrical impulse continues, an area between the atria and the ventricles
Atrioventicular node
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There's less muscle and elastic tissue to allow flow of blood under lower pressure
Veins
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Has a thick muscle layer to resist pressure changes
Artery
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This fills with newly oxygenated blood returning from the lungs.
Left atrium
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Ventricular contraction- blood is forced through the pulmonary artery to the lungs and through the aorta to the rest of the body.
Ventricular systole
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They're lined with a single layer of endothelial cells
Capillaries
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Has valves to prevent back flow of blood.
Veins
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Ventricular relaxation- the bicuspid and tricuspid valves open and the next pumpful of blood enters the ventricles from the atria.
Ventricular diastole
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How much blood does the heart pump per minute around the body.
5 dm^3 or 5 litres+
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Other cards in this set

Card 2

Front

The atria relaxation- blood enters the atria from the pulmonary veins or vena cava.

Back

Atrial diastole

Card 3

Front

These are the upper chambers and they receive blood that is being returned to the heart.

Back

Preview of the front of card 3

Card 4

Front

This receives blood with little oxygen because blood has already circulated throughout the body delivering oxygen and nutrients.

Back

Preview of the front of card 4

Card 5

Front

This sends an electrical impulse to the atria.

Back

Preview of the front of card 5
View more cards

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