| Front | What are capillaries? |
| Back | Microscopic blood vessels that link arterioles and venules.Substances are exchanged through the capillary walls between the tissue cells and the blood. |
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| Front | What is the route of the blood once it leaves the cells? |
| Back | Cells - Capillaries - Venules - Larger veins - inferior vena cava (lower body) / superior vena cava (head + upper body) - heart. |
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| Front | What is an aneurysm? |
| Back | A bulge or weakness in a blood vessel. |
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