Final Assessment -Fundamentals of Animal Body Systems Digestive Fundamentals of Animal Body Systems:Digestive 1 of 20 Which of the following is a very heavily muscled part of the stomach which closes and allows time for the digestia in the stomach to it digested? Pyloric sphincter valve Gallbladder Mesentery tissue Esophageal groove

## Step 1<br />The question is asking for the part of the stomach that is heavily muscled and serves to close, allowing time for digestion to occur. The options provided are the Pyloric sphincter valve, Gallbladder, Mesentery tissue, and Esophageal groove.<br /><br />## Step 2<br />The Pyloric sphincter valve is a muscular valve that regulates the passage of partially digested food from the stomach to the small intestine. It is heavily muscled and serves to close, allowing time for digestion to occur.<br /><br />## Step 3<br />The Gallbladder is a small organ that stores bile produced by the liver. It does not play a direct role in digestion.<br /><br />## Step 4<br />The Mesentery tissue is a fold of the peritoneum that attaches the stomach to the abdominal wall. It does not play a direct role in digestion.<br /><br />## Step 5<br />The Esophageal groove is a part of the digestive system in some animals, but it does not play a direct role in digestion.