How do living things get rid of cellular waste?

This is not my field, but the following answer seems to explain it well:

http://www.ehow.com/about_5049652_cell-waste-disposal.html

yeah

Living things, including humans and other animals, have various mechanisms to get rid of cellular waste. One important process is called excretion, which involves the removal of waste products produced by cells. Here's how it works:

1. Cells produce waste: As cells carry out their metabolic activities, such as breaking down nutrients for energy, they generate waste products. These waste products can include carbon dioxide, ammonia, urea, and other harmful substances.

2. Transport of waste: Once waste has been produced inside the cells, it needs to be transported to organs or systems responsible for excretion. In multicellular organisms, this involves the circulatory or lymphatic system.

3. Filtering and purification: In many organisms, especially vertebrates like humans, the circulatory system carries waste-laden blood to specialized organs for filtration and purification. For example, in humans, the kidneys play a crucial role in filtering waste products from the blood.

4. Elimination: After the waste has been filtered and processed, it needs to be eliminated from the body. This is typically done through specific excretory organs. For example, in humans, the main organs of excretion are the kidneys, which eliminate liquid waste in the form of urine, while the respiratory system eliminates gaseous waste like carbon dioxide through breathing.

To summarize, living things get rid of cellular waste through processes like excretion, where waste products are filtered, purified, and eliminated from the body through specialized organs.