how this food enters into the oesophagus correctly ? write a note?
please answer me its very urgent
Answers
Ans= The upper esophageal sphincter opens (2) so that food can enter the esophagus, where waves of muscular contractions, called peristalsis, propel the food downward (3). The food then passes through the diaphragm (4) and lower esophageal sphincter (5) and moves into the stomach.
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The Digestive Process: How Does The Esophagus Work?

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The Digestive Process: How Does the Esophagus Work?
Your esophagus is an important part of your digestive system and your digestive tract. Your digestive tract is a series of hollow organs that carry food from your mouth to your anus. The food you eat can't be used for energy until your digestive system breaks it down into small molecules that your body can absorb.
The role of your esophagus
When your mouth forces fluid or chewed food into your throat, your brain begins the process of swallowing. You use your voluntary nervous system to start a swallow. Your involuntary nervous system takes over your swallowing once the liquid or food enters the top of your esophagus.
Stretching from food or liquid stimulates the smooth muscles that make up the walls of your esophagus. This stimulates a dense network of nerves inside your muscles. These nerves, known as intrinsic nerves, start a coordinated muscle action called peristalsis. Peristalsis squeezes your esophageal muscles from top to bottom. This pushes food and liquid along. If you could see peristalsis, it would look like a wave passing down your esophagus.
To keep food and liquids moving in the right direction, your digestive tract has special muscles along its course called sphincters. Sphincters act like one-way valves. They relax to let food and liquid pass into your stomach and then tightens to prevent backflow, called reflux.