BMAT 2022 section 2, question 1

How does excretion release water vapour into the atmosphere?

I don’t have the full context of the question, but given that sweat is a form of excretion, then water evaporates from the skin and is released into the atmosphere

I was thinking perhaps they considered exhaling a form of excretion as well, in that case it would make sense for water vapour to be one of the contents of the mixture of gasses living organisms emit during exhalation. But I can’t find relevant info about that online.

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