The fuse is a device used in an electrical circuit for protecting electrical devices against overloads and or short circuit. It is the simplest and cheapest devices used for interrupting an electrical circuit under short circuit, or excessive overload, current magnitudes.
This shows an image through the wall of the body of the stomach at low power. You should be able to identify the three major layers seen here - the mucosa, submucosa and muscularis externa. The mucosa is full of gastric glands and pits, and there is a prominent layer of smooth muscle - the muscularis mucosa. The contraction of this muscle helps to expel the contents of the gastric glands. The muscularis externa layer has three layers of muscle.
PERISTALSIS: the rhythmic muscular contractions that push digested food in one direction through the gastrointestinal tract see book page 184, fig. 4 The bolus is swallowed and travels down the esophagus into the stomach. It moves down the esophagus by peristalsis. B. STOMACH: physical and chemical digestion The bolus passes through the CARDIAC SPHINCTER, the top opening in the stomach. Sphincter: a muscle that controls the opening i) cardiac: esophagus & stomach ii) pyloric: stomach and duodenum