Accessory Organs GI PDF
Document Details
Uploaded by DeadCheapGenre
null
Tags
Related
Summary
This document explains the accessory organs of the gastrointestinal tract, including the liver, gallbladder, and pancreas. It details their locations, functions, and roles in digestion.
Full Transcript
Accessory GIT Organs Liver Gall bladder Pancreas Position in the body Liver is in the cranial abdomen, caudal to the diaphragm Gall bladder is a small green sack that lives within the lobes of the liver Pancreas – lies next to the duodenum Liver Dark red, red-brown, lobulated...
Accessory GIT Organs Liver Gall bladder Pancreas Position in the body Liver is in the cranial abdomen, caudal to the diaphragm Gall bladder is a small green sack that lives within the lobes of the liver Pancreas – lies next to the duodenum Liver Dark red, red-brown, lobulated organ in the cranial abdomen Very dense texture Sharp edges = normal Smooth, shiny Function of the Liver Production of bile Process nutrients Storage of fat-soluble vitamins (A, E, D, K) - DEAK Detoxification of medications & breakdown of hormones for elimination Portal Circulation The nutrients absorbed by the intestines are drained into the veins All these veins converge to form one vein called the portal vein This travels to the liver takes nutrients, medications, toxins etc to the liver to metabolise/distribute to organs that need them After the blood has been “filtered” it then goes into the caudal vena cava to be returned to the heart Gall Bladder Stores and concentrates bile to be secreted into the small intestine Does not produce bile – liver does Not present in horse and rat Bile Important role in fat breakdown – breaks down fats in GIT allowing them to be absorbed Secreted into small intestine via bile duct Usually green/yellow pigment The Pancreas Two parts (types of cells) to the gland: Exocrine pancreas – secretes digestive enzymes into the GIT. Exocrine = A gland that makes substances such as sweat, tears, saliva, milk, and digestive juices, and releases them through a duct or opening to a body surface eg. Digestive enzymes Endocrine pancreas – secretes hormones (insulin) into the blood Endocrine = The glands and organs that make hormones and release them directly into the blood so they can travel to tissues and organs all over the body eg. insulin Exocrine pancreas Secretes digestive enzymes in their inactive form into the intestine Pancreas Enzymes within the duodenum activate these enzymes so they start digestion Protects the pancreas from digesting itself Pale cream/pale pink lobulated organ that is connected to the duodenum (right cranial abdomen) Secretes enzymes into the duodenum through the pancreatic duct How does the GIT sit in the body...? (important to know this for your physical exam) Reptile GIT – very varied