Circulatory system- blood vessels (Edexcel GCSE Biology): Flashcards
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Practise the cards
15 cards from this deck
Direction of blood flow in arteries
Direction of blood flow in arteries
Away from the heart
Type of blood most arteries carry
Type of blood most arteries carry
Oxygenated blood
Type of blood pulmonary artery carries
Type of blood pulmonary artery carries
Deoxygenated blood
Why arteries have thick walls
Why arteries have thick walls
To withstand high pressure
Size of artery lumen
Size of artery lumen
Narrow
Direction of blood flow in veins
Direction of blood flow in veins
Toward the heart
Type of blood most veins carry
Type of blood most veins carry
Deoxygenated blood
Type of blood pulmonary vein carries
Type of blood pulmonary vein carries
Oxygenated blood
Why veins have thin walls
Why veins have thin walls
Blood is under lower pressure
Size of vein lumen
Size of vein lumen
Wide
Function of valves in veins
Function of valves in veins
Prevent backflow of blood
Main function of capillaries
Main function of capillaries
Exchange of substances between blood and cells
Thickness of capillary walls
Thickness of capillary walls
One cell thick
Why capillaries have thin walls
Why capillaries have thin walls
Allow rapid diffusion of molecules
Substance diffusing into cells for respiration
Substance diffusing into cells for respiration
Oxygen