* Carbon dioxide (CO2): Produced during cellular respiration, the process where our cells break down food for energy.

* Water (H2O): Also produced during cellular respiration and other metabolic processes.

* Nitrogenous waste: Primarily urea, produced from the breakdown of proteins and nucleic acids.

* Other waste products: These can include salts, pigments (like bilirubin), and other byproducts of specific metabolic reactions.

The body has various mechanisms to eliminate these waste products:

* CO2: Exhaled through the lungs.

* Water: Excreted through urine, sweat, and respiration.

* Nitrogenous waste: Primarily excreted through urine by the kidneys.

* Other waste products: Excreted through urine, feces, sweat, and other mechanisms.

The type and amount of waste products produced vary depending on factors like diet, activity level, and overall health.