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11 Cards in this Set
- Front
- Back
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Give 4 functions of blood |
It transports oxygen from lungs to all parts of the body It transports co2 from all parts of the body go lungs Transfers nutrients from gut yo all parts of body Transports urea from liver to kidneys |
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What are the 2 main types of organisms? |
Single celled organisms Multi cellular organisms |
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How do single celled organisms absorb oxygen |
From the surface of the cell |
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Why can't larger organisms obtain oxygen this way? |
As their surface area to volume ratio is small |
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What are the 2 main types of circulatory systems? |
Single circulatory system Double circulatory system |
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What happens in a single circulatory system? |
Blood is pumped from the heart to the gas exchange organ and then to the rest of the body |
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What happens in a double circulatory system? |
Blood pumps from the heart to the gas exchange organ, back to the heart and then to the rest of the body |
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Why is double circulation much more efficient than single circulation? |
As Thr blood is pumped twice so it has twice the pressure therefore it moves a lot faster |
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What are the 2 main types of double circulation ? |
Pulmonary circulation Systemic circulation |
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What happens during pulmonary circulation? |
Blood is pumped through the lungs where it is oxygenated |
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What happens during systemic circulation? |
Blood travels to all parts of the body where it unloads oxygen |
