<span>The answer for this question would be: a portion of the heme group
Stercobilin is metabolized from heme of the hemoglobin. Iron from hemoglobin will be recycled and the heme part will turn into bilirubin which will be dump into feses. Inside intestine, bilirubin will be converted into urobilinogen then oxidized into stercobilin</span>
Based on their roles, the neurons found in the human nervous system can be divided into three classes: sensory neurons, motor neurons, and interneurons.
