What is the difference between constipation and intestinal obstruction?

Constipation is a symptom performance, a variety of factors will cause, and intestinal obstruction is a disease, its intestinal peristalsis is normal, but the contents of the intestinal tract because of some reasons can not pass through the intestinal tract smoothly and lead to defecation exhaust. Constipation intestinal peristalsis is not good, but his defecation is relatively normal.