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The Nervous system

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FC: By: Aimee Gay Period 7 | the nervous system

2: The Neurons: There are three different types of neurons: Sensory, Motor and Association The neurons can only carry messages one way, and form the body's communications system. The neurons make sure the brain knows what the body is doing. And take messages to organs and tissues

3: Sensory Neurons: Transfer messages from the sense organs (skin, eyes, ears, nose, and tongue) to the brain and spinal cord.

4: Motor Neurons: Transfer messages from the brain and spinal cord to muscles, causing movement, or to glands, causing a secretion.

5: Association Neurons: Found within the brain and spinal cord. They are there to connect sensory and motor neurons.

6: Reflex: The term reflex means to "turn back". Reflexes are involuntary. Most reflexes are protective in nature. The brain is actually not involved in reflexes. The transfer of a message between a sensory neuron to an association neuron, and then to a motor neuron is called a reflex arc.

7: The central nervous system consists of the brain and spinal cord. And both are covered by mengines. | The principle areas of the brain include the cerebrum, the cerebellum, and the medulla oblongata. | The cerebellum controls muscular coordination. The cerebrum receives sensory messages. The medulla oblongata connects to the spinal cord.

8: Autonomic = A nervous system which controls internal activities such as digestion, respiration, and circulation. | The Cerebrum: Each half of the cerebrum is called a hemisphere.The top layer of the cerebrum is called the cerebral cortex. The motor area controls muscle movement. The cerebrum is divided down the middle by a deep groove called a fissure.

9: The Cerebellum: Found below and behind the cerebrum. Is divided into two hemispheres and has layers of both white and grey matter. the surface is folded many times otherwise it would not fit inside our head.The main function of the cerebellum is to control balance and coordination. | The Medulla Oblongata: The lowest part of the brain. Composed of both white white and grey matter. Grey matter controls life activities. White matter is like a switchboard for sensory messages. | The Spinal Cord: A long bundle of nerves inside the vertebral column.There are 31 pairs of nerves connected to the spinal cord that carry messages to all parts of the body.Some carry messages to the brain and others carry them to muscles and glands.

10: The Peripheral Nervous System: There are 43 pairs of peripheral nerves including 12 pairs of cranial nerves connected to the brain. The parasympathetic part of the brain slows down activities. The longest cranial nerve is the vegas nerve. | Autonomic = A nervous system which controls internal activities such as digestion, respiration, and circulation.

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Aimee Gay
  • By: Aimee G.
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  • Title: The Nervous system
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  • Started: over 7 years ago
  • Updated: over 7 years ago