The Nervous System Ch. 9 Lesson 2 Pages 272-277. The Command Center of the Body The nervous system: Is your body’s control center Carries messages to.

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Presentation transcript:

The Nervous System Ch. 9 Lesson 2 Pages

The Command Center of the Body The nervous system: Is your body’s control center Carries messages to and from your brain Controls breathing Controls the flow of blood throughout the body Can be harmed or permanently damaged by alcohol

The Command Center of the Body Neurons are also called nerve cells. neurons Cells that make up the nervous system Neurons send and receive messages to and from the brain in the form of tiny electrical charges.

The Parts of the Nervous System The two parts of the nervous system are: The central nervous system (CNS) The peripheral nervous system (PNS) central nervous system Made up of the brain and the spinal cord peripheral nervous system Made up of the nerves that connect the central nervous system to all parts of the body

The Parts of the Nervous System The brain works with the spinal cord. brain The command center, or coordinator, or the nervous system spinal cord A long bundle of neurons that sends messages to and from the brain and all parts of the body

Problems of the Nervous System The nervous system can become injured, or it may be affected by diseases and disorders.

Your Nervous System

Injuries A brain injury can cause brain damage, loss of memory, and the loss of some physical abilities.

Disorders Multiple Sclerosis (MS) Cerebral Palsy Alzheimer’s Disease Parkinson's Disease Epilepsy MS attacks the central nervous system and damages the outer part of some nerves. Cerebral palsy is caused by damage to the brain as it is growing. Alzheimer’s causes a loss of memory, mental deterioration, and death. People with Parkinson’s disease often have shaking and stiffness of the arms and legs. Epilepsy occurs when the signals in the brain aren’t sent in the normal way, sometimes causing seizures.

Caring Advances in science can help people who suffer from diseases such as MS and cerebral palsy. Many organizations work to help medical researchers find cures for these disorders.

Infections Some viruses that can harm the nervous system include: Polio Rabies Meningitis

Alcohol and Drug Abuse Alcohol can destroy millions of brain cells, which can never be replaced. Other drugs harm the brain by affecting sleeping, breathing, sleeping, and the way your nervous system sends and receives messages.

Taking Care of Your Nervous System Follow positive health practices. Eat nutritious foods and get enough rest. Protect yourself from disease. Get vaccinated and avoid risky situations. Protect yourself from physical injury when playing sports. Wear protective gear. Never dive into shallow water. Have someone spot you when weight lifting. Follow traffic rules.Obey all signs and wear a safety belt when in a car. Practice positive health behaviors. Decide never to use alcohol or other drugs.