gastrointestinal tract

abdominal anal anatomical anatomy anus appendix background bile biology bladder body canal care cavity chart cirrhosis colon colorful common description design detailed diagram digestive disease drawing duodenum gall gallbladder gastrointestinal gland graphic health healthy hepatic hepatitis human illustration image info intestinal intestine jejunum large liver medical medicine organ organs other pancreas poster rectum science scientific small spleen stomach surgery surrounding system tract vector vital white with