THE NERVOUS SYSTEM

The structures and functions of the body's Nervous System

Body Systems

The Nervous System controls the human body's actions and reactions. It does this by sending electrical messages throughout the body. The brain is the center of the nervous system. The spinal chord of the nervous system allows your brain to communicate to the rest of your body. The spinal chord sends an electrical message to communicate with the body. The spinal chord is made up of nerves, which is a collection of nerve cell extensions. The spinal chord is protected by bones called vertebrae.
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Levels of Orginization - Cells and Tissue

The nervous system starts with small cell extensions, called nerves. These nerves are made up of connective tissue and blood vessels. Nerves are made to create the spinal chord.
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Levels of organization - organs and organ systems

The Nervous System's main organs are the brain and spinal chord. Both work together to allow you to act, and react in many different ways. The nerves in your spinal chord help you do these actions and reactions.
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Levels of organization - organism

All humans' nervous system satrts of with the brain in your head, which connects to the spinal chord which goes down your body, and is protectecd by a bone called the vertebrae. nerve extensions extend down your arms and legs, which then allows you to move your arms and legs.
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Homeostasis

The nervous system allows you to act and react, so it allows your body to make certain actions and reactions depending on the temperature around you. For example, if you are cold, the nervous system will send an electrical message to your muscles to wrap your arms around your chest.

If the nervous system fails to get information outside the body, there can't be electrical messages sent to muscles to react. An example is when someone is paralyzed from breaking their neck. If the neck breaks, the spinal chord can't send messages to your arms or legs.

Stroke, Parkinson's disease, and other diseases or body problems like sclerosis can affect memory and keep the body from performing certain activities we as humans do daily.

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Interactions

The body interacts with the muscles by sending electrical messages to the muscles so they can move around. The nervous system also interacts with immune system. If your body is ill, the nervous system also can send a message to the immune system so the system can fight the illness
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