cardia of stomach的意思|示意

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Cardia of Stomach: What It Is and Its Usage

The cardia of the stomach is the opening to the stomach located between the esophagus and the stomach. The word cardia is derived from the Greek word for “heart”. It is located at the top of the stomach and is the first point of contact for food entering the stomach.

The primary purpose of the cardia of the stomach is to close off the stomach from the esophagus. This helps to prevent food contents from re-entering the esophagus after being swallowed. This is important because it can help to prevent regurgitation and acid reflux.

The cardia of the stomach is surrounded by small muscles called the cardiac sphincter. This sphincter serves to control the amount of food that enters the stomach. Normally, the sphincter is relaxed when food is swallowing and tightens as it passes through. This helps to keep gastric acid from traveling back up the esophagus.

The cardia of the stomach also serves a secondary purpose. It helps to push food further into the stomach for digestion. This is done by muscle contractions that occur when food passes through it. During this contractions the sphincter relaxes and the food is pushed further into the stomach where it can be further digested.

In summary, the cardia of the stomach is a vital part of the digestive system. Not only does it help to prevent food content from re-entering the esophagus, it also serves as a gatekeeper to the stomach, controlling the amount of food that enters and pushing it further into the stomach for digestion.