Answer:
Capillaries connect the arteries to the veins. The arteries deliver oxygen rich blood to the capillaries, where the exchange for oxygen and carbon dioxide occurs.
Explanation:
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1. is Biology
2. is C - bacteria
3. is A- carbohydrates
Cells because most living things like plant life and humans are made up of cells and animals are made up of cells too!
D) It can only be used in areas with specific kinds of rivers.
