The Brain
|
The Brainby Brooke Everything you learn, feel, do, and remember throughout your life is made possible by certain cells in your body. These cells send messages through your body. They help you move muscles when you want to play ball. They help you remember jokes. They allow you to learn to read and write. They cause you to feel happy or sad. They let you see, smell, speak and hear. They make your make your heart beat. They control your breathing and other body activities. These cells make up your nervous system. The nervous system includes the brain and spinal cord. You are smarter and able to do more things than any other living animal. That is because your nervous system is more developed. And that is what makes you human. Without a nervous system, you would not be able to think, feel or move. You would not be able to hear, see, talk, breathe, eat, or walk. In fact, you would not be able to do any of the things you do every day. Your life would be about as active as the life of a plant.
|
My Brainshared by Sean Ritter My brain works hard. It is like a computer that answers my questions and sends messages all over my body. My brain looks wrinkled, like a walnut shell. It will weigh between two and three pounds when I am an adult. My brain is very fragile and soft. It needs to be protected. My brain is protected by a very hard bone called a skull. If I touch the top of my head, I can feel my skull. And, my brain is under my skull! I have many nerves in my brain. My nerves are like little telephone lines that send messages all over my body. Some of these messages go to my body through my spinal cord. Messages from my brain move very quickly through my body. They move faster that I can blink my eyes! My brain keeps my heart beating and my lungs breathing. It makes me move. My brain makes me think and helps me remember things. My brain helps me talk, write, see, smell, hear, and many other things. It even helps keep me from falling down as much as I could! My brain works hard for me. The Brain
|
The BrainBy Sean, Jeff, Raymond, Zach The
brain looks like a mass of grey jelly and is very soft. The human brain is
quite large but wrinkled which makes it compact. The brain is the body
control center. It is involved with what we do and what we think as well
as what we feel and remember. We also use our brain to learn.
The
brain has three main sections: the cerebrum, the cerebellum, and the brain
stem. The cerebrum fills the whole upper part of the skull, about
nine-tenths of a person’s whole brain. Cerebrum is divided into four
part called lobes. This is the “thinking brain” in which language,
memory, sensations, and decision-making are located. The
cerebrum: The largest part of
the brains consists of two sections. Together they are known as cerebral
hemispheres or cerebrum. Different areas of the cerebrum relate to
different parts of the body and to different needs. The deeply wrinkled
grey crinkly surface of your cerebrum is known as the cerebral cortex. The
cortex consists of six layers of cells. It is here that you do most of
your thinking. The cortex is about as thick as a piece of cardboard, and
if it were flattened out, it would take up as much space as the top of a
kitchen table. The cortex is made up of ten to fourteen billion neurons.
The cerebral cortex is working every time you listen to music, taste an
apple, play a computer or make some part of your body move. The cerebellum means little brain and it looks like a smaller version of the cerebrum. It’s tucked underneath the cerebral hemispheres, and it also has two hemispheres that are connected to each other by a thick band of nerves. Other nerves connect the cerebellum to the rest of your brain. The cerebellum is the brain center for muscle movement, posture, and coordination. The cerebellum is the part of your brain that lets you drink water without spilling it, or run easily. It constantly receives messages about the body’s actions and positions, and then sends back commands to the muscles, adjusting the way the body moves. Your cerebellum acts like a small computer to coordinate information from your cerebrum and your muscles so that you can do things like walk, ride a bike or play soccer. It also gives you the ability to know the position of any part of your body without seeing it and is involved in some kinds of memory and language. Nerves: Nerves don’t touch one another; a message has to leap from one to the next across a gap called a synapse. A synapse is about one-millionth of an inch wide. It is a kind of living switch. This depends on axons, impulses, chemicals and dendrites. Brain cells can also store information. A piece of stored information is called a memory. One part of our brain stores long-term memories and another stores recent memories. Your brain can be divided into four main parts, with each part being responsible for specific jobs. Your feeling brain, made up of your limbic system, which includes hippocampus and amygdales, plays a big a role in your emotions and laying down memory. Your thinking brain is made up of your cerebrum. It receives messages from your senses and interprets the world through them, stores memories, and allows you to understand, communicate and express emotion. Your reptilian brain made up of your brain stem, medulla, and pons takes care of the things you never have to think about, such as your heartbeat, digestions, breathing, sneezing and coughing. Your cerebrum is made up of two halves, known as hemispheres. The left cerebral hemisphere is mostly responsible for speech, reasoning, reading, writing and arithmetic. Both halves of your cerebrum are connected by bundles of nerves fibers the most important being the corpus collosum. The right cerebral hemisphere is mostly responsible for awareness of three-dimensional forms, appreciation of music and art, insight, imagination and creativity. The right side of the brain holds our artistic talent and imagination. The left side is responsible for more practical abilities and logical thinking.
|
