… system is made up of Heart, blood vessels and blood
Circulatory
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Double circulatory system in ...
humans
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Resting heart rate is controlled by a … in a group of cells in right atrium wall which produces small electrical impulses
pacemaker
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… arteries surround the heart and come off the aorta, which gives the heart oxygenated blood
Coronary
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Carry blood away form the heart
Arteries
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Involved in exchange of materials at tissues
Capillaries
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Carry blood in to the heart
Vein
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Thick outer wall, Thick inner layer of muscle and elastic fibres and a narrow lumen
Artery
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Thin outer wall, wide lumen and have valves, thin inner layer of muscle and elastic fibres
Vein
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One cell thick
Capillary
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?= Volume of blood/Number of minutes
Rate of blood flow
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They carry oxygen, have a large surface area to absorb oxygen, don't have a nucleus and contain haemoglobin
Red blood cells
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They defend against infection, have a nucleus and produce antibodies and antitoxins to fight microorganisms
White Blood Cells
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They help blood clot, have no nucleus, clot a wound and stop microorganisms getting in
Platelets
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This carries everything in the blood
Plasma
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These keep arteries open
Stents
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This is cause when fatty material blocks the arteries an blood flow is restricted so oxygen isn't delivered
Heart Attack
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These reduce cholesterol in the blood, and are drugs which decrease the amount of bad cholesterol, they reduce the risk of heart attacks
Statins
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This is a temporary thing which can pump blood around the body, and is used if the persons heart fails and there is no-one to donate a heart
Artificial Heart
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Faulty ... can be replaced with bio or mechanical ones. They become damaged and don't work effectively, and severe damage means the valve needs replacing
Heart Valves
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This can help keep you alive in emergency situations, used to replace lost blood. It is made of saline and the patient may be able to make more blood or have a transfusion
Artificial Blood
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Other cards in this set
Card 2
Front
Lungs are separated from lower body by the …
Back
Diaphragm
Card 3
Front
Lungs are protected by the ...
Back
Card 4
Front
?= Number of breaths/Number of minutes
Back
Card 5
Front
… system is made up of Heart, blood vessels and blood
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