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Topics: Cerebrum, Central nervous system, Brain Pages: 6 (2172 words) Published: February 24, 2014


Activity 2.1.2: Build-A-Brain

Introduction
Your alarm goes off and your arm flies up to hit the snooze button. You drag yourself out of bed and decide what to wear and what to have for breakfast. Your sister’s pancakes smell good so you grab a few bites while she’s not looking and head out the door. Running late (as usual), you sprint to catch your bus. You struggle to keep your balance as you head to the back of the already moving vehicle. A younger kid slams into your side with his book bag. You are about to yell, but you figure it’s not worth it and grab a seat. You finish up the last of your math homework and turn on your iPod to clear your head. You have two tests and then a game after school. You think to yourself, “How am I going to get through the day?”

All the events of your morning and all the events of the day to come are controlled by your control center, the brain. The brain allows us to move, to breathe, to make decisions, to solve problems, to feel emotions and to interact with the world around us. This 3lb, jellylike organ is often compared to a computer, but the brain is so much more complicated than even the biggest, fastest supercomputer- thanks to the 100 billion nerve cells that keep our body functioning (that’s more nerve cells than stars in the galaxy!). The brain is the key to communication in the human body. This organ not only allows your systems to communicate with one another, but allows you to communicate with and respond to your surroundings.

The central nervous system (CNS) consists of the brain and the spinal cord, while the peripheral nervous system (PNS) consists of a system of nerve cells that transmit information to and from the control center. These two systems work together to make sure important information gets to your brain to be processed and interpreted and to make sure that the correct response is generated.

In this activity, you will build a model brain and create the spinal cord on your Maniken®. As you build, you will begin to see connections between specific parts of the brain and specific actions, thought processes and functions that make us human. Equipment

Computer with Internet access and Microsoft Excel or other spreadsheet software (optional) Anatomy in Clay® Maniken®
Terra cotta, blue, pink, green and bone colored clay
Wire loop or wooden knife
Body system graphic organizer handouts
Directional terms graphic organizer
Laboratory journal
Reference textbook (optional)
Procedure
Directions for this activity were modified from Starla on Maniken® by Zahourek Systems Inc. and were used with permission.

1. Research the structure and function of the Central Nervous System (CNS) and the Peripheral Nervous System (PNS). Use a reference textbook or a reliable Internet resource. 2. Obtain a body system graphic organizer from your teacher. Draw and label the main structures of the CNS and the PNS on a human body system handout labeled “Nervous System.” 3. In this activity, you will be working with your partner to build the CNS on your Maniken®. Refer to your directional terms organizer (if needed) as you work through the directions. 4. Turn your model sideways so the hollow portion of the skull is facing you. 5. From the outside, notice that the brain appears as three distinct structures- the cerebrum (which is divided into four different parts, or lobes; each plays a unique role), the cerebellum and the brain stem. View this basic structure at Centre for Neuro Skills: http://www.neuroskills.com/brain.shtml#map. Refer to this diagram as you build on your Maniken®. 6. First, construct the four lobes of the cerebrum.

7. Notice that the surface of the brain does not look so neat and smooth. The bumpy surface of the cerebrum is covered with peaks and valleys called gyri and sulci. Make a loose fist with your right hand. The top of each finger represents a gyrus; the fold between two fingers is known as a sulcus. Note these folds on the brain...
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