8778879
Description
Flashcards by Jenny Dove, updated more than 1 year ago
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Created by Jenny Dove
over 7 years ago
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| Question | Answer |
| THE CIRCULATION SYSTEM; | * CIRCULATION SYSTEM CONSISTS OF THE BLOOD, ARTERIES , CAPILLARIES AND THE HEART. |
| THE BLOOD; | * PEOPLE HAVE 4 - 5L OF BLOOD; * 50% BLOOD IS PLASMA; (pale liquid of 95% water // 3 TYPES) * PLASMA CONSISTS OF- glucose,amino acid,wastes,hormones and CO2. |
| Plasma #1 - RED BLOOD CELL; |
* MOST NUMEROUS = RED COLOUR
* RED CHEMICIAL = HAEMOGOBLIN = O2
* DIS-SHAPED + THICK AT EDGES
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| Plasma #2 - WHITE BLOOD CELL; |
* NOT MUCH OF THESE;
* NO SHAPE;
* PROTECT BODY AGAINST DISEASE.
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| Plasma #3 - PLATELETS; |
* TINY FRAGMENT CELLS;
* CAUSE BLOOD TO CLOT.
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| FUNCTIONS OF BLOOD #1 | TRANSPORT; * transport substances around the body. * living cells need; food molecules, O2 , hormones. |
| FUNCTIONS OF BLOOD #2 | DEFENCE AGAINST DISEASE; * white blood cells engulf bacteria and make antibodies to kill them. |
| BLOOD VESSELS; | * 3 TYPES; * ARTERIES * VEINS * CAPILLARIES |
| ARTERIES; | * Thick walls, * Narrow lumen, * No valves, * Carry blood AWAY from the heart. |
| VEINS; | * Thin walls, * Wide lumen, valves, * Carry blood TO THE heart. |
| CAPILLARIES; | * Link arteries to veins, * Wall is only one cell thick allows substances in & out of Blood. |
| THE HEART; | * Made of of cardiac muscle - never tires, * 4 chambers |
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