| | Conditions Treatments | Bones, Joints Muscles What do bones excrete? Bones are tissues in the body. They don't excrete anything. The process of excretion mainly occurs in the kidneys, liver, lungs, and part of the digestive system. Bones, Joints Muscles - Related Articles What types of schizophrenia are there? Is FSH the same as testosterone? Side Effects of Xeloda on the Eyes Piriformis Muscle Syndrome & Stretches How to Raise an ADD Child Without Medication What makes muscle soreness and fatigue? About Apple Cleansing Fasts