Snow and ice in the high latitudes generally do not melt even during the summer monthsâthey accumulate over time. Layers of snow fall and are covered by subsequent layers. As layers of snow accrue, their vertical thickness increases, and the snow transforms into ice as the air is squeezed out.
In humans, the brain also controls our use of language, and is capable of abstract thought. The brain is the control centre of the whole body. The brain is made up of a special type of cells.They are connected with each other and with the nerves in our body.he brain stem is at the back of the brain (actually underneath it in humans). It joins the rest of the brain with the spinal cord. It has lots of different parts that control different jobs in the body: for instance, the brain stem controls breathing, heartbeat, sneezing, eye blinking, and swallowing.
The brain is like a computer that controls the body's functions, and the nervous system is like a network that relays messages to parts of the body. Click through this slideshow to learn more about the brain and nervous system. The largest part of the brain, the cerebrum has two hemispheres (or halves). The cerebrum controls voluntary movement, speech, intelligence, memory, emotion, and sensory processing. At the base of the brain, the brain stem connects to the spinal cord and is made up of the midbrain, pons, and medulla oblongata. The midbrain acts like a complex switchboard, allowing the brain to communicate with the rest of the nervous system.