Circulatory System in Mammals (AQA A-Level Biology): Flashcards
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What type of circulatory system do mammals have?
What type of circulatory system do mammals have?
Closed, double circulatory system
Why 'double' circulation?
Why 'double' circulation?
Blood passes through heart twice per complete circuit
How many chambers in mammalian heart?
How many chambers in mammalian heart?
Four chambers
Function of arteries
Function of arteries
Carry blood away from heart at high pressure
Function of veins
Function of veins
Return blood to heart at lower pressure
Function of capillaries
Function of capillaries
Smallest vessels where exchange of substances occurs
Aorta function
Aorta function
Carries oxygenated blood from left ventricle to body tissues
Pulmonary artery carries
Pulmonary artery carries
Deoxygenated blood from right ventricle to lungs
Distance of all cells from a capillary
Distance of all cells from a capillary
Within 1mm
Main advantage of double circulation
Main advantage of double circulation
Maintains high blood pressure for efficient transport