Transport in animals

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Why are specialised systems needed?
high metabolic demands, need high SA:Vol, transport of hormones, waste needs to be removed
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What are features of transport systems?
pump (heart), liquid (blood), vessels (veins etc)
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Describe open systems?
low pressure, direct contact with tissue, few vessels, can't vary flow,
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Describe closed systems?
no direct contact, high pressure, more vessels, amount of blood flow can be adjusted,
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Describe single closed systems?
fish, lower demands, lower pressure, once through heart, 2 chambers,
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Describe double closed system?
mammals, 2 systems - 1 oxygenated 1 deoxygenated, 4 chambers in heart, through hearttwice,
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3 components of blood vessels?
elastic fibres, smooth muscle, collagen
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Describe arteries?
carry oxygenated blood (excet pulmonary) elastic to withstand pressure,
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What do capillaries do?
link arterioles and venules.
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What do veins do?
Carry blood away from the heart
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Other cards in this set

Card 2

Front

What are features of transport systems?

Back

pump (heart), liquid (blood), vessels (veins etc)

Card 3

Front

Describe open systems?

Back

Preview of the front of card 3

Card 4

Front

Describe closed systems?

Back

Preview of the front of card 4

Card 5

Front

Describe single closed systems?

Back

Preview of the front of card 5
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