Nervous System (Science Report) Essay

-The queasy carcass is a real complex governing body in the ashes. It has more, many sidetracks. The spooky system is dual-lane into two main systems, the central sick system (systema nervosum centrale) and the peripheral scatter wizarded system. The spinal stack and the wit make up the CNS. Its main course is to get the info from the tree trunk and send out instructions. The peripheral sickish system is made up of each(prenominal) of the glueyness and the wiring. This system sends the messages from the wittiness to the rest of the body.-The peripheral nervous system consists of the nerves that lie extracurricular the judgement and the spinal cord. These nerves carry impulses like sensations and breeding from the body to the spinal cord and from the spinal cord to the body. Thus, the peripheral nervous system connects the CNS to the muscles of the body.-The central nervous system (CNS) is the processing center for the nervous system. It receives instructio n from and sends culture to the peripheral nervous system. The two main variety meat of the CNS ar the mind and spinal cord. The brain processes and interprets sensorial information sent from the spinal cord. Both the brain and spinal cord are protected by three layers of connective tissue called the meninges. -The function nervous system is the major controlling, regulatory, and communicating system in the body. It is the center of all mental activity including thought, learning, and memory.II.The organsCentral Nervous formation instinctthe brain is one of the most important organs in the tender body system. It is the center of all commands. It monitors all the conscious and unconscious processes of the body. The brain coordinates various organs of the body and controls all the volunteer movements in the body. The brain is the organ that helps you remember things, learn, understand, think, create, talk, hear, taste, etc. The brain is dissever into three segments, that is, stalk brain, mid brain and the hind brain. The fore brain consists of the cerebral hemispheres and olfactory lobes. The mid brain is the region that mostly contains optic lobes, and the hind brain is the region that includes the cerebellum and the medulla oblongata. The pituitary gland is present in the move side of the fore brain. It is called the master gland as it regulates the function of many other glands in the body.Spinal CordThe spinal cord is a bundle of nerves that run down the back from the brain in the spinal column. The spinal cord is about 40 cm in length and as wide as the thumb. The function of the spinal cord is to relay all the impulses, information and sensations from all around the body, internally and externally, to the brain. If the spinal cord gets affected due to an injury, it may sever some or most of the connections between the brain and other parts of the body, leading to palsy in divers(prenominal) parts of the body like the upper and set about limbs. Peripheral Nervous SystemNervesThe 31 pairs of spinal nerves branch off and reach out to different parts of the body and perform different functions. The nerves of the cervical region supply information to the back of the head, neck, shoulders, arms, hands and the diaphragm. The nerves of the thoracic region supply information to the chest and some parts of the abdomen. The lumbar region nerves disguise the lower back, parts of the thighs and the legs. The nerves of the sacral region provide information to the buttocks, most of the leg, feet, anal and genital area.Somatic and Autonomic Nervous SystemThe PNS is further divided into the somatic nervous system and the autonomic nervous system. The somatic nervous system contains sensory (afferent) neurons that carry information from organs/muscles to the CNS, and motor (efferent) neurons that carry information from the brain and spinal cord to muscles of the body. sensory neurons provide the brain all the information regarding the en vironment. The somatic nervous system plays an important role in transmitting the information and controlling voluntary movement.Sympathetic and Para freehearted Nervous SystemThe autonomic system regulates the voluntary body functions like respiration, heartbeat, blood flow and digestion. It is further subdivided into the sympathetic nervous system which regulates your flight-or-fight responses, and the parasympathetic system that helps regulate various normal functions of the body, for example, internal arousal, salivation, lacrimation (shedding tears), urination, digestion, and defecation. Functions of the parasympathetic nerves include constriction of eye pupils, sum up in secretion of saliva, increased digestion, lower in heartbeat, etc. The sympathetic nerve functions involve dilation of eye pupils, sweating, production of goose bumps, decrease in digestion, etc. One of the important nerves, the vagus nerve is divided into sympathetic and parasympathetic nerves.The sensory system is also a part of the nervous system. Sensory systems for vision, hearing, somatic sensation (touch), taste and olfaction (smell) swear out with the help of the sensory receptors, neural pathways and certain parts in the brain that help process sensory information. When you feel cold or intent, it is the sensory neurons that are doing their work. The motor neurons are reactors, that help the body react to different environment. For example, the immediate pulling away of your hand when you touch a hot stove is a motor neuron reaction. The somatic motor neurons take in orders to the muscles.A subsystem of the peripheral nervous system is the enteric nervous system. Normally, it communicates with the CNS but studies show that it works autonomously too. It regulates the gastrointestinal system in the body.III. treble Sclerosis A chronic disease of the nervous system that throw out affect young and middle-aged heavy(a)s. The course of this illness usually involves recurrent relapses followed by remissions, but some patients experience a chronic progressive tense course. The myelin sheaths surrounding nerves in the brain and spinal cord are damaged, which affects the function of the nerves involved.Also associated with aging. Tremor, rigidity and poverty of extemporaneous movements.The grossest symptom is tremor, which often affects one hand, spreading first to the leg on the same side then to the other limbs. It is most profound in resting limbs, interfering with such actions as holding a cup.The patient has an unexpressive face, an unmodulated voice, an increasing tendency to stoop, and a shuffling walk. Sciatica A common condition arising from entreation of, or damage to, a nerve or nerve root. Usually caused by degeneration of an intervertebral disc, which protrudes laterally to compress a lower lumbar or an upper sacral spinal nerve root.The onset may be sudden, brought on by an awkward lifting or twisting movement. Pain felt down the back an d outermost side of the thigh, leg, and foot. The back is stiff and painful. There may be impassivity and weakness in the leg.IV.A. The cortex gets its name from the Latin word for skin (of atree).B. There are approximately 100 billion neurons in the kind brain.C. The average human brain weighs about 3 pounds (1.4 kilograms).D. Unlike humans, the octopus does not have a blind spot.E. The average length of the adult spinal cord is 45 cm for men and 43 cmfor women.