A volcano is a vent or fissure in Earth's crust through which lava, ash, rock and gases erupt. A volcano is also a mountain formed by the accumulation of these eruptive products.Let's take a look at how volcanoes form: Earth's crust is 40 to 250 miles (64 to 402 kilometers) thick.irborne fragments of lava, called tephra, are ejected from a single vent. The lava cools rapidly and builds up around the vent, forming a crater at the summit. Cinder cone volcanoes are fairly small, generally only about 300 feet (91 meters) tall and not rising more than 1,200 feet (366 meters).
10 hilariously insightful foreign words. The glossopharyngeal nerve is also called the ninth cranial nerve. Cranial nerves are vital nerves that arise from the brain that help the brain control muscles, process the five senses, and control glands in the body.
Nerve C6 controls movement in the wrists and C7 controls the triceps. Cervical nerve C8 works to control the hands. These functions are assisted through the branching of nerves from the brachial plexus to the regions they control.hese nerves in the neck form the phrenic nerve, which helps control the diaphragm and regulate breathing. Injury to the phrenic nerve can result in problems breathing and even death. Ad. Together, nerves C1-C4 work to complete the functions of the cervical plexus.