Circulatory system - blood vessels (Edexcel GCSE Biology Combined Science): Flashcards
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Blood flow direction in arteries
Blood flow direction in arteries
Away from the heart
Artery carrying deoxygenated blood
Artery carrying deoxygenated blood
Pulmonary artery
Why arteries have thick walls
Why arteries have thick walls
To withstand high pressure
Blood flow direction in veins
Blood flow direction in veins
Toward the heart
Vein carrying oxygenated blood
Vein carrying oxygenated blood
Pulmonary vein
Function of valves in veins
Function of valves in veins
Prevent backflow of blood
Capillary wall thickness
Capillary wall thickness
One cell thick
Main function of capillaries
Main function of capillaries
Exchange of substances
Substances diffusing into cells
Substances diffusing into cells
Oxygen and glucose
Substances diffusing out of cells
Substances diffusing out of cells
Carbon dioxide and urea