structure and function of nervous system pdf

Structure And Function Of Nervous System Pdf

File Name: structure and function of nervous system .zip
Size: 22755Kb
Published: 05.06.2021

The central nervous system CNS is the part of the nervous system consisting primarily of the brain and spinal cord.

The Form and Functions of the Central Nervous System

Nervous tissue , also called neural tissue , is the main tissue component of the nervous system. The nervous system regulates and controls bodily functions and activity and consists of two parts: the central nervous system CNS comprising the brain and spinal cord , and the peripheral nervous system PNS comprising the branching peripheral nerves. It is composed of neurons , also known as nerve cells, which receive and transmit impulses, and neuroglia , also known as glial cells or glia, which assist the propagation of the nerve impulse as well as provide nutrients to the neurons. Nervous tissue is made up of different types of neurons, all have an axon. An axon is the long stem-like part of the cell that sends action potentials to the next cell. Functions of the nervous system are sensory input , integration, control of muscles and glands , homeostasis , and mental activity.

The central nervous system consists of the brain and spinal cord. This article gives a brief overview of the central nervous system CNS. We will look at the types of cells involved, different regions within the brain, spinal circuitry, and how the CNS can be affected by disease and injury. Here are some key points about the central nervous system. More detail and supporting information is in the main article.

The picture you have in your mind of the nervous system probably includes the brain , the nervous tissue contained within the cranium, and the spinal cord , the extension of nervous tissue within the vertebral column. The brain is contained within the cranial cavity of the skull, and the spinal cord is contained within the vertebral canal of the vertebral column. The peripheral nervous system is so named because it is in the periphery—meaning beyond the brain and spinal cord. In addition to the anatomical divisions listed above, the nervous system can also be divided on the basis of its functions. The nervous system is involved in receiving information about the environment around us sensory functions, sensation and generating responses to that information motor functions, responses and coordinating the two integration. Sensation refers to receiving information about the environment, either what is happening outside ie: heat from the sun or inside the body ie: heat from muscle activity.

What Are Neurons?

That suggests it is made of two organs—and you may not even think of the spinal cord as an organ—but the nervous system is a very complex structure. Within the brain, many different and separate regions are responsible for many different and separate functions. It is as if the nervous system is composed of many organs that all look similar and can only be differentiated using tools such as the microscope or electrophysiology. In comparison, it is easy to see that the stomach is different than the esophagus or the liver, so you can imagine the digestive system as a collection of specific organs. Figure 1. Central and Peripheral Nervous System The structures of the PNS are referred to as ganglia and nerves, which can be seen as distinct structures.

The nervous system consists of the brain, spinal cord, sensory organs, and all of the nerves that connect these organs with the rest of the body. Together, these organs are responsible for the control of the body and communication among its parts. The brain and spinal cord form the control center known as the central nervous system CNS , where information is evaluated and decisions made. The sensory nerves and sense organs of the peripheral nervous system PNS monitor conditions inside and outside of the body and send this information to the CNS. Efferent nerves in the PNS carry signals from the control center to the muscles, glands, and organs to regulate their functions. The majority of the nervous system is tissue made up of two classes of cells: neurons and neuroglia. Neurons, also known as nerve cells, communicate within the body by transmitting electrochemical signals.

Thank you for visiting nature. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser or turn off compatibility mode in Internet Explorer. In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript. IN no part of the body is the relation of form and function so clear as in the central nervous system. Modern neurology owes its present position to advances in knowledge which have come from many sources.

All about the central nervous system

The nervous system transmits signals between the brain and the rest of the body, including internal organs. The human brain contains about billion neurons. Bundles of axons, called nerves, are found throughout the body. Axons and dendrites allow neurons to communicate, even across long distances. Different types of neurons control or perform different activities.

Neurons, also known as nerve cells, send and receive signals from your brain. Specialized projections called axons allow neurons to transmit electrical and chemical signals to other cells. Neurons can also receive these signals via rootlike extensions known as dendrites.

NCBI Bookshelf. Parker E. Ludwig ; Vamsi Reddy ; Matthew Varacallo.

Skip to main content Skip to table of contents.

Nervous System Anatomy

 - На его компьютере уже стоял жучок! - Он говорил, стараясь, чтобы его слова были слышны между сигналами.  - Этот жучок вмонтировал кто-то другой, и я подозреваю, что по распоряжению директора Фонтейна. Я просто попал на все готовое. Поверь. Поэтому я и узнал о его намерении модифицировать Цифровую крепость. Я читал все его мозговые штурмы. Мозговые штурмы.

 Пока не везет.  - Она вздохнула.  - Быть может, придется ждать, пока Дэвид не найдет копию Танкадо. Стратмор посмотрел на нее неодобрительно. - Если Дэвид не добьется успеха, а ключ Танкадо попадет в чьи-то руки… Коммандеру не нужно было договаривать.

 Выходит, выбор оружия был идеальным. Сьюзан смотрела, как Танкадо повалился на бок и, наконец, на спину. Он лежал, устремив глаза к небу и продолжая прижимать руку к груди. Внезапно камера отъехала в сторону, под деревья. В кадре возник мужчина в очках в тонкой металлической оправе, в руке он держал большой портфель. Выйдя на открытое место и бросив взгляд на корчащегося на земле Танкадо, он задвигал пальцами, словно исполнял ими какой-то причудливый танец над коробочкой, которую держал в руке. - Он работает на Монокле, - пояснил Смит.

Они наклонялись и распрямлялись, прижав руки к бокам, а их головы при этом раскачивались, как безжизненные шары, едва прикрепленные к негнущимся спинам. Какие-то безумцы ныряли со сцены в это людское море, и его волны швыряли их вперед и назад, как волейбольные мячи на пляже.

 Установлена аудиосвязь. Через пять секунд она станет двусторонней. - Кто это такие? - переминаясь с ноги на ногу, спросил Бринкерхофф. - Всевидящее око, - сказал Фонтейн, вглядываясь в лица людей, которых он отправил в Испанию. Это была вынужденная мера.

У Бринкерхоффа подогнулись колени. Он не мог понять, почему Мидж всегда права. Он не заметил отражения, мелькнувшего за оконным стеклом рядом с. Крупная фигура возникла в дверях директорского кабинета.

Что это за имя такое - Капля Росы. Он в последний раз взглянул на Клушара. - Капля Росы.

5 comments

Blumacecblog

tional units of the nervous system. Neurons transmit messages to and from the brain. They consist of a cell body and processes (nerve. StruCture aNd FuNCtioN​.

REPLY

Lowell G.

Gathers information from both inside and outside the body - Sensory Function. 2. The Nervous System is divided into Two Main Divisions: Central Nervous System Limbic System – a group of brain structures (aamygdala, hippocampus,​.

REPLY

Are P.

Nervous system , organized group of cells specialized for the conduction of electrochemical stimuli from sensory receptors through a network to the site at which a response occurs.

REPLY

Malguen P.

Ssrs interview questions and answers for 3 years experienced pdf harry potter and the deathly hallows free online pdf

REPLY

Leave a comment

it’s easy to post a comment

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>