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16 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Advantage of double circulatory system |
High pressure is maintained as blood is pumped twice per full cycle |
2x |
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Name of blood vessels entering and leaving the lungs |
Pulmonary vein and artery |
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Name of blood vessels entering and leaving the kidneys |
Renal vein and artery |
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Adaptations of arteries |
Thick walls, many elastic fibres, smooth endothelium |
Away |
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Adaptations of veins |
Thin walls, wide central lumen, less elastic fibres, contains valves |
To |
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Structure of capillaries |
Wall is one cell thick, huge network throughout body |
1 cell |
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Function of valves in the heart and veins |
Prevent the backflow of blood |
Backflow |
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Define cardiac cycle |
The sequence of events that make up one heart beat |
Sequence |
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Define the systematic circuit |
The part of the human circulatory system which transports blood away from the heart to the major organs of the body |
Body |
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Define pulmonary circuit |
The part of the huma circulatory system that transports blood away from the heart to the lungs only |
Lungs |
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Position of heart valves during the atrial systole |
AV valves open, SL valves closed |
'And s' is closed |
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Position of heart valves during ventricular systole |
AV valves closed, SL valves open |
Velcome S |
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Position of heart valves during dystole |
AV valves closed, SL valves closed |
Di = both |
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Cardiac output = |
Stroke volume × heart rate |
So very high rightnow |
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How does fatal heamlglobin differ? |
Higher affinity to oxygen |
Higher |
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Why does fetal haemoglobin differ? |
Allows fetal haemoglobin to become saturated with oxygen even when mothers haemoglobin is not fully saturated |
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