| 1. |  Key Concept List the main function of red blood cells, white blood cells, and platelets.  |
| 2. | Key Concept Describe the role of the lymphatic system. |
| 3. | What types of materials are dissolved in plasma? |
| 4. | Explain how blood clots. |
| 5. | Critical Thinking Inferring Sometimes lymph nodes must be surgically removed. Although more lymph vessels eventually grow, what result would you expect to see immediately after surgery? |
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