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Central Nervous System. Everything else makes up the peripheral nervous system.

2007-08-01 03:12:39 · answer #1 · answered by akfortysheep 1 · 6 1

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RE:
the brain and spinal chord make up wich part of the nervous system?

2015-08-16 16:05:49 · answer #2 · answered by Anonymous · 1 0

They make up the largset part of the nervous system, Central Nervous System. Together with the peripheral nervous system, it has a fundamental role in the control of behavior. The CNS is contained within the dorsal cavity, with the brain within the cranial subcavity, and the spinal cord in the spinal cavity.
Since the strong theoretical influence of cybernetics in the fifties, the CNS is conceived as a system devoted to information processing, where an appropriate motor output is computed as a response to a sensory input. Yet, many threads of research suggest that motor activity exists well before the maturation of the sensory systems and then, that the senses only influence behavior without dictating it. This has brought the conception of the CNS as an autonomous system.
In the developing fetus, the CNS originates from the neural plate, a specialised region of the ectoderm, the most external of the three embryonic layers. During embryonic development, the neural plate folds and forms the neural tube. The internal cavity of the neural tube will give rise to the ventricular system. The regions of the neural tube will differentiate progressively into transversal systems. First, the whole neural tube will differentiate into its two major subdivisions: spinal cord (caudal) and brain (rostral/cephalic). Consecutively, the brain will differentiate into brainstem and prosencephalon. Later, the brainstem will subdivide into rhombencephalon and mesencephalon, and the prosencephalon into diencephalon and telencephalon.
The CNS is covered by the meninges, the brain is protected by the skull and the spinal cord by the vertebrae. The rhombencephalon gives rise to the pons, the cerebellum and the medulla oblongata, its cavity becomes the fourth ventricle. The mesencephalon gives rise to the tectum, pretectum, cerebral peduncle and its cavity develops into the mesencephalic duct or cerebral aqueduct. The diencephalon give rise to the subthalamus, hypothalamus, thalamus and epithalamus, its cavity to the third ventricle. Finally, the telencephalon gives rise to the striatum (caudate nucleus and putamen), the hippocampus and the neocortex, its cavity becomes the lateral (first and second) ventricles.
The basic pattern of the CNS is highly conserved throughout the different species of vertebrates and during evolution. The major trend that can be observed is towards a progressive telencephalisation: while in the reptilian brain that region is only an appendix to the large olfactory bulb, it represent most of the volume of the mammalian CNS. In the human brain, the telencephalon covers most of the diencephalon and the mesencephalon. Indeed, the allometric study of brain size among different species shows a striking continuity from rats to whales, and allows us to complete the knowledge about the evolution of the CNS obtained through cranial endocasts.

2007-08-01 04:24:28 · answer #3 · answered by Monkey 3 · 0 2

The nervous system which is made up of many parts is divided into two main systems - the central nervous system (CNS) and the peripheral nervous system (PNS).The brain and spinal cord are part of the central nervous system. Both are made up of neurons. The brain is considered as the command center or the main information center of the body. The spinal chord is the pathway of the messages from different nerves that are sent to the brain.

2007-08-01 05:38:21 · answer #4 · answered by ♥ lani s 7 · 0 1

Central Nervous System

2007-08-01 03:12:59 · answer #5 · answered by DAR76 7 · 1 2

Spinal CORD. A "chord" is a harmonious group of musical notes.

And, yes, it's the central nervous system.

2007-08-01 06:50:44 · answer #6 · answered by Pangolin 7 · 0 1

10:34 am Wednesday, February 27th 2013. Salt Lake City

2016-03-13 10:03:46 · answer #7 · answered by ? 3 · 0 0

Of course they make Central Nervous System(CNS).

2007-08-01 03:42:51 · answer #8 · answered by Numil 2 · 1 2

the central nervous cistum

2015-01-22 11:09:02 · answer #9 · answered by Stacia 1 · 1 0

Central ofcourse.

2007-08-01 04:00:22 · answer #10 · answered by Karthikeyan 2 · 0 2

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