biology revision cards.

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what does the circularity system carry?
it carries oxygen and glucose to your blood cells so that energy is relised
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why does heart pump blood around the body
your heart relaxes to fill with blood and your heart contracts and squeezes the blood out into the arteries.
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what happends when the heart contracts?
the blood is put under pressure and is sent to the arteries so that blood can reach all parts of the body
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what is blood pressure?
it is a measure of the force of blood per unit area as it flows through the arteries its also measured in millimeters of mercury.
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what 2 measurements is blood pressure measured in?
systolic-the first number is the pressure in your arteries when your heart contracts when the blood pressure is at its highest and the 2nd one is diastolic which is the second number is the pressure in your arteries when your heart relaxes.
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what is the normal blood pressure?
120/80 but this can be affected by age and lifestyle.
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what are the factors that lead to high blood pressure?
excess weight so people who are very overweight also high stress levels and excess alcohol.
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what are the causes of heart disease?
high blood pressure. smoking, to much salt and high in fat diets.
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Other cards in this set

Card 2

Front

why does heart pump blood around the body

Back

your heart relaxes to fill with blood and your heart contracts and squeezes the blood out into the arteries.

Card 3

Front

what happends when the heart contracts?

Back

Preview of the front of card 3

Card 4

Front

what is blood pressure?

Back

Preview of the front of card 4

Card 5

Front

what 2 measurements is blood pressure measured in?

Back

Preview of the front of card 5
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