author(s)
Dr. K Raja, Dr. S Ushakumary, Dr. Geetha Ramesh, S Ramesh and Ganne Venkata Sudhakara Rao

abstract
Large intestine of guinea pig comprised of caecum, colon and rectum. Caecum was the largest and more voluminous segment of the large intestine. Caecum was located in ventral third of the abdominal cavity. Caecum had sacculations and haustra. Caecum was divisible into ampulla caeci, corpus caeci and apex caeci. Opening of the ileum and colon was located in the ampulla caeci with little distance from one another. Colon was the longest segment of the large intestine and divided into three parts namely ascending colon, transverse colon and descending colon. Colon started from caeco-colic orifice and extend cranially to form the proximal colon. Rectum was the terminal portion of the large intestine which was straight without any wrinkles and its diameter was apparently larger than that of colon.