B3e - The Circulatory System

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What is the function of 'Red Blood Cells'?
Red Blood Cells transports oxygen from the lungs to the tissues.
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What is the function of 'Platelets'?
Platelets clump together when a blood vessel becomes damaged. They help the blood to clot.
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What is the function of 'White Blood Cells'?
White Blood Cells help protect against diseases.
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What is the function of 'Plasma'?
Plasma transports dissolved substances, cells and cell fragments such as hormones, antibodies, nutrients(water,glucose,amino acid, minerals and vitamins) and waste substances(carbon dioxide and urea).
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Describe the structure of a Red Blood Cell.
Small+Flexible - they can easily pass through narrow capillaries. A Biconcave Shape/flatenned shape - provides a large surface area to volume ratio for absorbing oxygen. Contains Haemoglobin - red protein in RBC, it transports oxygen around*
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What is the function of 'Haemoglobin'?
Haemoglobin absorbs oxygen from the lungs and releases oxygen in the rest of the body.
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How does Haemoglobin form Oxyhaemoglobin?
Haemoglobin molecules in red blood cells bind with oxygen to form oxyhaemoglobin.
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What is the word equation for Oxyhaemoglobin?
Haemoglobin + Oxygen = Oxyhaemoglobin
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What is the function and adaptations of Veins?
Veins transport blood towards the heart at a low pressure. A Large Lumen - big compared to the thickness of the walls. Presence of Valves - to prevent back flow of blood.
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What is the function and adaptation of Arteries?
Arteries transport blood away from the heart a high pressure. A thick wall made out of elastic muscle fibres to cope with high pressure.
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What is the function and adaptation of Capillaries?
Capillaries allow the exchange of materials between blood and tissues. Thin Permeable walls which allow the exchange of substances
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What is a 'Double Circulatory System' and what are the advantages?
They are found in mammals. One circuit links the heat and lungs. One circuit links the heart and the body. The blood is pumped at a higher pressure to the body. It provides a greater rate of flow to the body tissues.
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Why does the Left Ventricle have a thicker muscle wall than the right ventricle?
The left ventricle pumps blood under pressure around the body where at the right ventricle pumps blood at a short distance.
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Name the four main chambers
Left and Right Ventricles. Left and Right Atria.
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What is the function of the left and right atria?
The Left and Right Atria receive blood.
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What is the function of the left and right ventricles?
The Left and Right Ventricles pump blood.
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What is the function of the Semi-lunar, Tricuspid and Bicuspid Valves?
They prevent back flow.
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Other cards in this set

Card 2

Front

What is the function of 'Platelets'?

Back

Platelets clump together when a blood vessel becomes damaged. They help the blood to clot.

Card 3

Front

What is the function of 'White Blood Cells'?

Back

Preview of the front of card 3

Card 4

Front

What is the function of 'Plasma'?

Back

Preview of the front of card 4

Card 5

Front

Describe the structure of a Red Blood Cell.

Back

Preview of the front of card 5
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