What is one of the outputs or products of respiration?

It has to be a four letter word with the second letter being e
because it is the hint that my teacher gave us.

I couldn't find anything on it. So far I have disocovered is carbon dioxide, water, and atp.

Although I can't find any data to support this, it might be "cell".

One of the outputs or products of respiration is "waste." Waste products are generated during the process of cellular respiration as cells break down glucose to produce energy. These waste products include carbon dioxide and water, which are eliminated from the body through exhalation and urination.

To find a four-letter word with the second letter being "e" related to respiration, you can try to think about other terms associated with this process. One potential word that matches the requirements could be "exon," which refers to a segment of DNA that codes for a functional product. However, it's important to note that this may not be the exact answer your teacher is looking for, as respiration typically involves waste products rather than functional DNA segments specifically. It might be best to consult with your teacher directly for clarification.