logo

7. Bilirubin Excretion

A red blood cell lives about 120 days before it starts to disintegrate. The hemoglobin from disintegrated red blood cells breaks down into four parts: globin, protein, iron, and heme. Heme eventually reduces into an orange-yellow pigment called bilirubin. This waste product moves to the liver, where it becomes more soluble and is combined with bile; the excretory system then excretes it as feces and urine.

liver

deliormanli / Getty Images

Advertisement
Advertisement
Advertisement

Popular Now on Facty Health


Disclaimer

This site offers information designed for educational purposes only. You should not rely on any information on this site as a substitute for professional medical advice, diagnosis, treatment, or as a substitute for, professional counseling care, advice, diagnosis, or treatment. If you have any concerns or questions about your health, you should always consult with a physician or other healthcare professional.