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WRITE DOWN EVERYTHING IN BOLD
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THE NERVOUS SYSTEM
By Krystal, Aimee, Karisma…. And Tyler
FUN FACTS1. There are more nerve cells in the human brain than there are
stars in the Milky Way.
2. If we lined up all the neurons in our body it would be around 600
miles long.
3. There are 100 billion neurons in your brain alone.
4. A newborn baby's brain grows almost 3 times during the course
of its first year.
5. The left side of human brain controls the right side of the body
and the right side of the brain controls the left side of the body.
FUN FACTS PART 2
6. A New born baby loses about half of their nerve
cells before they are born.
7. As we get older, the brain loses almost one gram
per year.
8. There are about 13, 500,00 neurons in the human
spinal cord.
9. The total surface area of the human brain is
about 25, 000 square cm
KEY TERMSBrain- Soft mass of tissue inside the cranium
Nerve- Group of nerve tissues that conduct impulses
Spinal Cord- A column of nervous tissue extending from the
medulla oblongata of the brain to the second lumbar vertebra
in the vertebral column.
Hypothalamus- That structure in the diencephalon of the
brain that regulates and controls many body functions
KEY TERMS PART 2
Ventricle- a cavity in the brain
Pons- Portion of the brain stem that connects the
medulla oblongata and the cerebellum to the upper
portions of the brain
Medulla Oblongata- The lower part of the brain
stems; controls vital processes such as respiration
and heartbeat
Meninges- Membranes that cover the brain and
spinal cord
HEALTH CARE CAREERS
Neurosurgeon- one who performs on any part of the brain and or nervous
system.
Psychiatrist- a medical practitioner specializing in the diagnosis and treatment
of mental illness
Physical Therapist- health care professionals that help patients reduce pain and
help repair motor skills
Chiropractor- health care professionals that diagnose, treat, and/or problems
with the spine.
Mental Health Technicians- health care workers who help psychiatrists with
mental health patience.
REGIONS OF THE BRAIN
The peripheral nervous system consists of two systems.
The Somatic nervous system and the Autonomic nervous system
The Somatic nervous system has 12 pairs of cranial nerves.
The Autonomic nervous system has 31 pairs of spinal nerves.
Cranial nerves give general sensations like pain, touch, sensations,
temperature, pressure, involuntary movements of muscles, etc.
Spinal nerves are used for sensory and motor skills.
The Peripheral Nervous System
AUTONOMIC NERVOUS SYSTEM
An important part of the peripheral nervous system.
This part of the system helps maintain a balance
in the involuntary functions of the body.
There are two divisions to the autonomic nervous
system:• Sympathetic Nervous System• Parasympathetic Nervous System
These two systems work together to maintain a balance state (homeostasis).
SYMPATHETIC NERVOUS SYSTEM
In times of emergency…• The sympathetic nervous system
prepares the body by:• Increase heart rate• Respiration• Blood Pressure• Slowing activity in digestive tract
PARASYMPATHETIC NERVOUS SYSTEM
After the Emergency…• The parasympathetic nervous
system prepares the body by:• Slowing the heart rate• Decreasing respiration• Lowering blood pressure• Increase activity in digestive
tract
DISEASES
Encephalitis- inflammation of the brain and is
caused by the virus, bacterium, or chemical agent.
Neuralgia- nerve pain
Meningitis- inflammation of the meninges of the
brain and/or spinal cord and is caused by a
bacterium, virus, fungus, or toxins