Reforestation is the natural or intentional restocking of existing forests and woodlands
1. Pathogens enter the body through a cut in the skin
2. Cells recognize the foreign invaders
3. Histamine is released
4. White blood cells travel to the invaded area
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Answer:
Does not contain electrons
Explanation:
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One way valves maintain the unidirectional flow.
Sun, flowers, mouse, snake, hawk
