* Carbon dioxide (CO2): A byproduct of cellular respiration, CO2 is transported from cells to the lungs for exhalation.
* Urea: A nitrogenous waste product formed from the breakdown of proteins. It is filtered by the kidneys and excreted in urine.
* Lactic acid: Produced during anaerobic respiration, especially during intense exercise. It is transported to the liver for processing.
* Bilirubin: A breakdown product of heme (the iron-containing portion of hemoglobin) that is transported to the liver and excreted in bile.
* Other metabolic byproducts: Various other waste products resulting from cellular processes are also picked up by blood and transported to organs responsible for their elimination, like the kidneys and liver.
It's important to note that the blood also transports nutrients and oxygen to cells, playing a crucial role in maintaining homeostasis within the body.
