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Description
Flashcards by Sahro Hussein, updated more than 1 year ago
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Created by Sahro Hussein
over 6 years ago
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| Question | Answer |
| Module 3.3 Circulation | By: Sahro Hussein |
| What is the circulation system? | It is your body's transport system |
| What are its functions? | 1-Carries nutrients & oxygen for respiration 2-Removes carbon dioxide 3-Transports other wastes products 4-Distributes heat around the body |
| What does it consist of? | Your heart, blood vessels, and blood |
| What are the 3 types of blood vessels in your body? | Arteries, capillaries and veins |
| What are the arteries? | They are blood vessels that carry blood from the heart |
| Why do arteries have tough walls? | So they can be able to withstand the pressure of when the heart pumps the blood into the arteries under pressure. |
| What are capillaries? | The finest piece of a artery |
| How thick are their walls? | One cell thick |
| Why are they so thin? | So dissolved materials can pass through |
| What do veins do? | They carry blood back to the heart |
| Why are the veins walls not like the arteries? | Because the pressure of the heartbeat is lost as the blood flows through the arrow capillaries |
| How do the bruises form? | They form when the tiny capillaries near your skin burst and blood leaks into the surrounding tissue |
| How big is our heart? | About the size of our fists |
| Where is it located? | In the middle of your chest, behind the breastbone |
| Do cardiac muscles get tired? | No, they are always pumping |
| What are the two halves separated by? | A thick wall called spectrum |
| What are the three main phases of a heartbeat? | The 2 atria's contract, pushing blood down into the ventricles The ventricles contract, forcing blood out of the heart to the body and lung The heart muscles relax and the atria fill with blood |
| Where are red blood cells made? | They are made in the bone marrow and the ribs |
| What chemical do they contain? | Haemoglobin |
| What does it do? | Gives the red blood cell its colour |
| What are white blood cells? | They a bigger than the red blood cells and are part of the immune system |
| What are platelets? | They are broken bits of cells that allow blood to clot. |
| What is plasma? | Plasma is a clear yellowish liquid that is 90% water and 10% other dissolved materials |
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