The Heart (OCR GCSE Biology A, Combined (Gateway Science Suite)): Flashcards
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Practise the cards
15 cards from this deck
Role of the heart in the circulatory system
Role of the heart in the circulatory system
Pump that circulates blood throughout the body
Two circuits in double circulatory system
Two circuits in double circulatory system
Pulmonary circuit and systemic circuit
Pulmonary circuit function
Pulmonary circuit function
Carries deoxygenated blood from heart to lungs for gas exchange
Systemic circuit function
Systemic circuit function
Carries oxygenated blood from heart to body tissues
Number of chambers in the heart
Number of chambers in the heart
Four (two atria and two ventricles)
Why left ventricle wall is thicker than right
Why left ventricle wall is thicker than right
Pumps to whole body vs right only pumps to lungs
Function of heart valves
Function of heart valves
Prevent backflow and ensure one-way circulation
Function of coronary arteries
Function of coronary arteries
Supply heart muscle with oxygenated blood
Natural resting heart rate (beats per minute)
Natural resting heart rate (beats per minute)
Around 70 beats per minute
Location of natural pacemaker cells
Location of natural pacemaker cells
Right atrium
Direction arteries carry blood
Direction arteries carry blood
Away from the heart
Direction veins carry blood
Direction veins carry blood
Towards the heart
Thickness of capillary walls
Thickness of capillary walls
One cell thick
Formula for rate of blood flow
Formula for rate of blood flow
Blood vessel carrying deoxygenated blood to lungs
Blood vessel carrying deoxygenated blood to lungs
Pulmonary artery