Excretion is the life process of getting rid of waste products and toxins from an organism. For example, the by-products of respiration are usually toxic to the organism that is carrying out respiration, and so they must be excreted.
In most micro-organisms, the toxic substances move out of the cell(s) by a process called diffusion. Diffusion occurs when particles move from an area of high concentration to an area of lower concentration.
Excretion
Excretion is the life process of getting rid of waste products and toxins from an organism. For example, the by-products of respiration are usually toxic to the organism that is carrying out respiration, and so they must be excreted.
In most micro-organisms, the toxic substances move out of the cell(s) by a process called diffusion. Diffusion occurs when particles move from an area of high concentration to an area of lower concentration.