The pancreas also has a component known as the tunicate process, which is different from other sections on the basis of anatomy.

The head section lies to the right side of the abdominal region in the close proximity of the duodenum (the first part of the small intestine). It is the widest part of the pancreas that is tucked in the C-shaped duodenal curve. Tunicate Process: The tunicate process is an extended portion of the head that appears very similar to a hook. It is this section that is bent and forms an angle and the rest of the body. This short section that lies between the head and the body is around 2.5 cm long. It lies posterior to the pyloric part of the stomach. The neck runs from the top-right portion of the head of the pancreas to the left, to connect and the body of the organ. This is the major part of the pancreas that lies between its neck and tail. This body region looks very similar to a prism. The stomach is just above the body of the pancreas, and is separated by the mental bursa, a pouch that lies between these two organs. This is the narrowest region of the pancreas, runs to the left side of the abdomen, and is adjacent to the spleen. 

This narrow end of the pancreas releases Soma Biotics pancreatic polypeptide (amino acids), which helps keep a check on the secretary activity of the organ. The body has 3 surfaces; namely, the inferior, posterior, and the anterior. The anterior surface lies opposite the front of the abdomen. The right half of this surface touches the transverse colon. The lower region of the right half touches the coils of the small intestine. The inferior surface is coated and a peritoneum serous membrane. The right side of the surface is narrower, while the left side is broader. The surface sits on the duodenojejunal―the border between the duodenum and the jejunum. Margins refer to the border or edge of the pancreas. The pancreas is bounded by 3 margins, which include the superior, inferior, and the anterior margin. The superior margin is flat at the right, and becomes narrower as it reaches the tail. On the other hand, the inferior margin acts as a line of separation between the posterior and inferior surface. The anterior margin helps differentiate between the anterior and inferior surface of the organ. Pancreatic Duct: The pancreatic duct is a small tube that runs from the head of the pancreas and enters the duodenum. It acts like a medium of connection between these two organs. In the pancreas, it runs from the left to right, and has numerous branches, known as lobular ducts. In the neck area of this organ, the pancreatic duct is slightly wider and moves downwards to connect and the common bile duct. 

The pancreas secretes digestive juices, which pass through the pancreatic duct and subsequently flow into the small intestine from the duodenum. The celiac artery and the superior mesenteric artery transport blood to the pancreas. Blood circulation to the neck, body, and tail of the pancreas comes from the branches of the splendid artery, an offshoot of the celiac artery. The head of the pancreas receives blood from the superior and inferior pancreatic duodenal artery that moves along the border of the front and back surfaces of the head of the pancreas. When you are chewing the food the saliva in the mouth, helps to breaks down the chemicals in the food to a small extent. This process makes the food mushy and easier to swallow, the movement of the tongue while chewing helps to move the food around, and the teeth help to chew the food. When the food is enough mushy, the tongue pushes small amounts of the mashed-up food (called bolus) inside the throat. There are also certain enzymes in the body which help in digestion, some of which are even present in the saliva. Traveling through the Esophagus Pipe the tongue pushes the bolus in the opening of the esophagus, which is a 25 centimeter long, stretchy pipe; which you can see in the digestive tract diagram. However, at the back of the throat there are two openings, one is the windpipe and the other is the opening of esophagus. 

A small flap called epiglottis, opens the opening of the esophagus to pass the food, and makes sure that the food doesn't go down the windpipe. But, many times if you eat too fast, you can swallow air and the food and get burps! This happens because swallowed air along and the food or liquid, which enters the stomach is pushed out through the esophagus. The food in the esophagus moves in a wavy path slowly, which takes around 2-3 seconds. In the Stomach the food after passing the esophagus pipe, enters the stomach, which is like a tilted shaped organ, as shown in the diagram. The stomach forms an important part of the digestive system; imagine a big house which keeps mixing and mashing all the mashed-up food, and helps to maintain digestive health. The stomach performs 3 major functions; it stores the food, it breaks down the mashed-up food into a liquid mixture, and slowly passes this mixture in the small intestine. The strong muscles in the walls of the stomach and the acidic gastric juices, help to break down the food, these juices also kill the bacteria present in the food. Passing the Small Intestine Small intestine is not small in length at all, but just called small intestine because it is small in width. It is actually a long tube, and an adult's small intestine is around 22 feet long! 

The digestive system provides the building blocks or important nutrients to the muscular system. The small intestine along and 3 more organs, which are the pancreas, liver, and gallbladder further break down the food to absorb all the essential nutrients like vitamins, minerals, carbs, proteins, and fats in the food. The blood comes to the liver, and the liver filters-out the harmful and waste substances. Liver is the largest organ in the body (after the skin), and it performs more than 500 functions. Passing the Large Intestine Large intestine anatomy is fatter compared to the small intestine, and if spread out would measure 5 feet. The large intestine function in digestion is to separate the waste food into solids and liquids, of which the solid waste comes out as feces. Well, this was all about the organs of the digestive system and their functions. So, just remember the order of the digestive system, the name of the organs, and their functions and you will be able to remember everything about this system easily. Here's something interesting you should know. A cow's digestive system is quite complex. Its stomach is divided into four parts. The first part helps to soften the food, the second sends the food back to the mouth where it get chewed again, the third part removes moisture from the food, and the last which is fourth part mixes the food and digestive juices. Complex, right? 

Birds have two sections in their stomach, one act as a storage room for excess; because, birds can't eat too much food in one go. So, why do we get a feeling of butterflies in the stomach? The fluttery feeling in the stomach is caused when you are nervous or excited. They say during such emotions the adrenaline is released which pulls the blood from stomach and transfers it to the muscles. This causes the feeling of butterflies in the tummy. If you experience this, then just breathe deeply, and in minutes you will be okay. Clams belong to a group of animals known as 'filter feeders'. They take in water and filter out the food particles using two valves. One valve filters out food from the water, while other filters out water. This keeps happening throughout their life! Must get tiring, I guess... You must have observed that students of biology dissecting frogs for study. This is because the digestive system and many other systems in the frog's body resemble that of a human being. Sloths are slow, real slow. But, did you know that even their digestive system works slowly? It can take up to a month to process food in its digestive system. Did you know that full-grown horse intestines are 90 feet long? Ever wondered why we get growling sensation or rumbling sound in the stomach when we are hungry? The rumbling sound is caused due to contraction of stomach and intestines. However, when we don't have food the rumbling sensation can be heard, because if there is food in the stomach the sound gets muffled.