Heart And Circulatory Flashcards by Pendar Ahmadvazir

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Q

Why is left side of heart thicker

A

thicker walks
higher pressure needed to pump blood to whole body

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Q

We have a double circulatory system

A

//

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Q

What is meant by a double circulatory system

A

blood enters heart twice every time it is pumped around body

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Q

Features of arteries

A

carry blood away from heart (like pulmonary artery)
thick walls
thin lumen
(to withstand high pressure)

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Q

Features of capillaries

A

one cell thick walls
to allow fast diffusion between blood + cells

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Q

Features of vein

A

carry blood to heart (pulmonary vein)
thin walls
wide lumen
wide valves
(to prevent backflow of blood)

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