Together, the nerves make up the peripheral nervous system, as distinguished from the central nervous system, which consists of the brain and spinal cord. There are 12 pairs of cranial nerves, which carry messages to and from the brain. Spinal nerves arise from the spinal cord and pass out between the vertebrae.
For Kids. What is a landform? The usual definition is that a landform is a natural feature of the solid surface of the earth. Using that definition, the four major landforms are mountains, hills, plateaus, and plains. But that's not the whole picture. Because oceans, lakes, rivers, and ponds are full of a variety of landforms, and some bodies of water are referred to as landforms themselves if they occurred naturally, because they can be found on the solid surface of the earth.
Some landforms are created in a matter of few hours, while others take millions of years to appear. There are many types of landforms on the earthâs surface. Following are some of the common types of landforms and their characteristics. Mountains are landforms higher than the surrounding areas. They are formed due to the tectonic movements, earthquakes, volcanic eruptions and erosion of the surrounding areas caused due to wind, water and ice. Mountains are found in the oceans and on land.