Food begins its journey through the digestive system in the mouth, before being pushed by a series of involuntary muscle contractions through the esophagus, then the stomach, and then the small and large intestines. The digestive system is essentially a series of long, hollow organs lined with muscles that contract in a rhythmic pattern, known as peristalsis, to keep food moving in the correct direction.Know More
The mouth is considered the first part of the digestive system because food is physically broken down there by chewing. Saliva also mixes with the food, starting the chemical digestion process that breaks larger molecules into small ones that the body can absorb. Once food is chewed and mixed with saliva, the tongue pushes food into the esophagus. This is the only voluntary muscle contraction in the digestive process. After swallowing, involuntary muscles begin pushing the food through the esophagus into the stomach. In the stomach, churning muscular contractions mix the food with digestive juices.
Once the food is combined with digestive juices in the stomach, it must be passed on to the small intestine. This occurs when the pyloric sphincter, a ring of muscle at the bottom of the stomach, relaxes and lets the food flow through. The partially digested food, now referred to as chyme, is then pushed through the small intestine by rhythmic, wave-like muscular contractions of the involuntary smooth muscle in the intestinal walls. After passing through the small intestine, the remaining food material is passed through the large intestine via the same process before being pushed out of the anus during a bowel movement.Learn more about Human Anatomy
The digestive system involves the mouth, throat, esophagus, stomach, small intestine, large intestine, pancreas, liver and gallbladder. The main organs involved in digestion include the esophagus, stomach, and the small and large intestines.Full Answer >
The distal esophagus is the end of the esophagus by the stomach, notes Medscape. It is primarily smooth muscle, just like the gastrointestinal tract, while the proximal esophagus by the throat is striated muscle. The central section transitions from striated to smooth muscle. The muscle layers perform peristalsis, pushing food to the stomach.Full Answer >
According to eMedicineHealth, a tear in the lining of the stomach or in the esophagus is called a Mallory-Weiss tear. These types of tears occur often after vomiting. However, they are also caused by straining, childbirth, forceful coughing and seizures. They are often found in people who binge drink.Full Answer >
The esophagus, also known as the food pipe, carries food from the mouth to the stomach. It is part of the digestive system and is approximately 10.5 inches long in fully grown adults.Full Answer >