Question

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Answer 1

Answer:

1. yes it contains...
2. Because of the valves, the blood can only move in one direction as it gets squeezed along. So it is a combination of blood pressure from the heart's pumping action, the valves, and muscle movement that gets the blood up the legs against gravity.

Explanation:

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Answer 2

Explanation:

1. We don't manufacture essential minerals in the body. We get them from our diet. The minerals come from rocks, soil, and water, and they're absorbed as the plants grow or by animals as the animals eat the plants.

1. Because of the valves, the blood can only move in one direction as it gets squeezed along. So it is a combination of blood pressure from the heart's pumping action, the valves, and muscle movement that gets the blood up the legs against gravity.