model of unhealthy lower rectum with inflamed vascular structures. problem of hemorrhoids and constipation closeup

anal anatomic anatomy anus body canal cancer care colon colonoscopy coloproctology constipation cracks diagnosis digestion digestive disease doctor erosions examination fissure fistula health healthcare help hemorrhoid hemorrhoidal human inflamed internal light lower medical medicine model organ pain plastic polyp problem proctologist rectal rectum structures swollen symptoms treatment unhealthy vascular white