Explanation:
1 Pulmonary circulation
2 supply of nutrients and the removal of waste
3 cardiovascular system
4 systemic circulation
5 heart
7 blood
The gradual abundance of oxygen (by product of photosynthesis) made it possible for aerobic organisms to grow more and evolve.
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There are 20 different types of Pringles
Energy is used to create matter.
Converts hydrogen atoms into helium.