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The Brain and Cranial Nerves The Brain and Cranial Nerves One of the most complex and fascinating things in the human body is the brain. The body is "capable of
complex organ in the human body. It controls the central nervous system (CNS), by way of the cranial nerves and spinal cord, the peripheral nervous system (PNS) and
and medulla oblongata. It also connects to the spinal cord and houses 10 out of the 12 cranial nerves. The brain is apart of the central nervous system (CNS) and
from the brain toward the spinal cord or out of the brain and spinal cord to effectors through cranial and spinal nerves. Stimulation of the effectors by motor neurons
tiny heart begins to beat by day twenty-one. The brain has developed into 5 areas and some cranial nerves are visible. Arm and leg buds are visible and the formation
Submitted by hubbajubbs on April 19, 2005
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The Brain and Cranial Nerves
One of the most complex and fascinating things in the human body is the brain. The body is "capable of almost everything, but it would not be possible, without the brain receiving information, and analyzing the information."
The brain is aware of its surroundings, via input from the spinal cord and cranial nerves. Cranial nerves with sensory functions allow us to smell and see. Nerves with both motor and sensory functions are responsible for everything from tasting and chewing, to breathing and the heating of your heart. Many of the little things we take for granted are also made possible by cranial nerves.
Solving problems, feeling hungry, laughing. Each of these activities occurs in a different region of the brain. The portion of the central nervous system is contained in the cranium. About one hundred billion neurons and ten to fifty trillion neuralgia make up the brain. In adults, the brain has a mass of about three pounds.
The four major parts of the brain are the Brain Stem, Cerebellum, Diencephalons, and the Cerebrum.
The brain stem is continuous with the Spinal Cord and consists of the Meclulla Oblongata, Pons, and the Mid Brain.
Posterior to the Brain Stem is the Cerebellum. Superior to the Brain Stem is the Diencephalon. The Diencephalons consists mainly of the Thalamus and Hypothalamus.
Supported on the Diencephalon of the Brain Stem, the Cerebrum which is the largest part of the brain.
Since the brain does not store oxygen, it needs a constant flow to prevent it shutting down.
Blood flows to the brain mainly via, the internal Caroticl and Vertebral Arteries. The internal Tugular Veins return blood from the head to the heart.
In adults, the brain is only two percent of the total body weight, but it consumes about two percent of the oxygen and glucose used at rest.
When activity of neurons and neuralgia increases in a...
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