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.
Another muscle in the body which has muscle fibers running in different directions is the tongue. The stomach is the only organ in the digestive system to have three muscle layers. The rest of the gastrointestinal tract, or GI tract, contains only two muscle layers. The muscles together as a group, are called the muscularis externa.