You may also have diarrhea or a fever. It is sometimes called stomach flu, but it is not the flu. Germs like viruses and bacteria can cause it. You can catch it from someone else who has it, or you can get it from food poisoning. Food poisoning can happen if you eat foods that contain harmful germs.
The circular muscle located at the entrance and exit to the stomach is called the sphincter. So for this question, you are talking about two distinct sphincters. This anatomical structure is able to open, and contract or close as needed.
The Abdominal Oblique Muscles. Location: The Abdominal Oblique muscle group forms the lateral abdominal wall. The two muscles in this group are the External Oblique and Internal Oblique, with the Internal Oblique lying deep to the External Oblique.Function: The abdominal muscles (or core muscles) function to form the foundation for all gross movements of the body.he abdominal oblique muscles form the lateral wall of the abdomen and function to move the trunk relative to the pelvis.