Question

where does this water vapour come from in exhaled air

what is being formed in the muscles?​

Answer 1

air which contains: more carbon dioxide produced as a waste product of energy production; less oxygen as it has been used in respiration.

Answer 2

Answer:

1.It is because water vapour is surely a form of water.So,when we exhale Carbon Dioxide on a mirror,we see the moisture in the form of water vapours.

2.Muscle is a soft tissue found in most animals. Muscle cells contain protein filaments of actin and myosin that slide past one another, producing a contraction that changes both the length and the shape of the cell. Muscles function to produce force and motion.

Explanation:

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