[DarkForbidden-Love]

Dark was confused how could there be nothing in it? He glanced at the pages and yes they had text on them. "Okay. Let us try something else." Dark wondered if it had something to do with the fact Alexander was from a book. "Excretion is the transfer of substances out of a living organism into its environment. At its simplest, for single-cell forms of life, this involves extrusion across the cell membrane of the unwanted or potentially toxic by-products of respiration and metabolism. This is also what is happening continually in the individual cells of the animal body, but from their immediate environment substances must move into the blood to be carried away to the site of their ultimate disposal. In the animal body there is also another type of excretion: expulsion of the residue of substances which have not been absorbed into the body proper from the gut, which can be considered a tunnel through the body of the external world.

In human terms ‘excreta’ normally refers only to urine and faeces, whereas the definition of excretion would also include both carbon dioxide and heat, and these will be considered first." Dark read that straight from the book and hoped Alexander had understood that. "As you can see it is something nessisary for a healthy lifestyle." Even though he read it straight from the book Dark was still feeling slightly embarrassd.