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Yes, they would have to, otherwise the digesta from the rumen and reticulum would be free come up if the stomach compartments get quite full. It is found at the junction between the esophagus and the ruminal/reticular junction. When a bolus of cud is to be regurgitated, the sphincter muscle relaxes and allows the cud to come up to be chewed, and relaxes again to allow the rechewed bolus to be returned to the rumen. Cardiac sphincters are also found between most of the chambers in the ruminant animal for the same reason as stated above. Check out the three sources below for further information and pictures for proof:
What else can I help you with?
Cardiac sphincter function?
What is the function of the cardiac sphincter?
What does the cardiac sphincter do in the human body?
The Cardiac sphincter prevents regurgitation of food from the stomach.
When the cardiac sphincter relaxes food enters the?
The cardiac sphincter or aka GE junction contracts at the distal end of the esophagus. So food enters into the stomach when the cardiac sphincter is relaxed.
What sphincter is involved in Acid reflux disease?
cardiac sphincter/lower esophageal sphincter (LES)
What are two muscular openings in the stomach?
The cardiac sphincter and the pyloric sphincter.
Is the cardiac sphincter at the junction of the stomach and small intestine?
The cardiac sphincter is the valve between the esophagus and the stomach.
Sphincter found between the esophagus and the stomach?
What is the function of the cardiac sphincter?
Why is the sphincter at the top of the stomach called the cardiac sphincter?
The sphincter at the top of the stomach is called the cardiac sphincter because it is located near the heart, which is known as the cardiac region. This sphincter helps regulate the passage of food from the esophagus into the stomach, preventing backflow of stomach contents into the esophagus.
What is the ring of muscles at the end of the esophogus called?
The esophageal sphincter ,which allows food to enter the stomach, and stops the acidic contents from entering the esophagus.
What closes the entrance to the stomach?
cardiac sphincter
The stomach sphincter that keeps food from reentering the esophagus when the stomach contracts is known as the?
It is known as the lower esophageal sphincter or sometimes the cardioesophageal sphincter.
The sphincter muscle that controls access to the stomach from the esophagus is called?
cardiac sphincter; or gastroesophageal sphincter; or lower esophageal sphincter (LES); or esophageal sphincter from http://en.wikipedia.org/wiki/Cardia
