Where do nearly all of the body’s chemical reactions, including those that produce energy and build new tissues, take place?

They occur in aqueous medium.

Explanation:

The human body is made up of approximately 60% water in adults and 80% in children. It is the main component of cells, also found outside of cells. In the viscera and muscles are located the cells that have the most water.

The reactions of our body (including those that produce energy and build new tissues) happen in aqueous environment, with water related to most of them, given this data can be measured how essential it is for the proper functioning of the organism. Without forgetting that it also acts on physiological functions such as digestion, being part of the gastric juice.

semen is the name of the fluid