Question

during transpiration, water and carbon dioxide are produced as waste. true or false


dash are present in vein which prevents the blood from flowing back to the organ.

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Answer 1

Answer:

2. The tunica intima of a deep vein usually has a one-way valve to prevent blood from flowing backward. Nearby muscles also compress the deep vein to keep blood moving forward.

So sorry but I don't know no. 1

Hope no. 2 answer will help you.