The nervous system, a control system

The nervous system, a control system

If you touch something very hot with your hand, remove it immediately to protect and avoid burning. This reaction is possible due to the nervous system, which allows us to give pertinent response, eficales and fast. It also acts in different functions such as circulation, digestion, and in situations in which we sweat, we run pain, we blink, heard music, and other activities

The nervous system sends its messages through a network of nerves that communicate the structures and organs so that the organism works properly. In some situations you can control the response you give to the information of the environment, in others not.

Think about whether you can control the heartbeat, the blood circulation process, or the digestion of food. In these cases you do not voluntarily decide on the enrichment, but in other situations, like running, jumping, singing.

Like human beings, the other vertebrate and invertebrate animals also have control systems, which allow them to coordinate their internal functions and respond to the stimulus of the environment, to which Peretenecen.

To understand the processes that allow the organisms to give the different responses to the stimulus. It is important to know how this constituted the nervous system and on which organ acts. Note the following diagram, in the same summarized in a nutshell the organization of the human nervous system.

The nervous system is formed, in turn, by two subsystems, called Central nervous system and periferico nervous system. Each one is aformado by a series of specialized organs and of structure that allow to maintain the communication and the internal equilibrium in the organism in a constant way, what is known as Homeostatis

The central nervous system coordinates and directs the human body in a symphonic orchestra the director fulfils the essential functions: the different instruments that compose the orchestra, maintain the piece time, indicate the entries of the different Instruments that execute their musicians so that the interpretation is ormonica and coherent. The Director maintains the communication, the Coordiancion and the general control. So also, the central nervous system controls the millions of nerve cells or neurons connected to each other and with different organs, to receive and transmit stimuli and originate complex and coherent responses.

The climber

The climber

Between Lomas grassy and hillsides populated by coffee plantations, around a tiny church raised on the Altozano, of humble walls of bahereque plaster, belfry to one side and atrium of bricks Mossy is nestled the village: a few ranches.

some So many houses, a single street that soon becomes a road and is resperentandoed by hills and slopes, between Hedges Pomarrosos.

Behind the church and throughout the village, the high and somber curtain of the guams and bucares that shelter the coffee plantations; In front of it, the soft and upholstered slope of the Altazano's grass, asendet by the passage of the recuas that down there descend from the lands and the neighboring mountains, the black roofs of the ranches and the patinos roofs of the houses; And even flank, the dilated, perspective of a mountain hole that comes bordering the road that leads to the town: Green hills, sloping slopes and silent ravines, Blue hills, distant serranias.

Paredeña to the temple, the parish house and beyond the civil headquarters, in front of which, Arrellanado in a chair lying on the wall, hallabase Don Lisandro, old burly, Bonachon and Pacienzudo, who had been practicing the headquarters of the village for several years, whose Single Pacific, few gave him to do. Barely had to afanaser and get out of his usual meekness for harvest time, when the fields and towns of the contour flocked to the neighboring haciendas the coffee pickers, then every night had horopos that usually ended In quarrels.

Because of the night before, and above all, for another event that much worried, had up early that day. He is mistaken for his uneasiness of encouragement was that continual movement of his jaw without knowing them had anything to chew.

At the door of the parsonage appeared the priest Escarbandose teeth and flicking the tongue loudly, as if savoring the remains that among those he left the copious breakfast.

-Good morning Don Lisandro.

-Good Dias PAE Jaramillo

It was this a Spanish cleric, Retaco, furry, and nothing clean, of fifty years well preserved that exerted the curate of souls of that village towards more than twenty. Rough hairs cubranle the face, wearing a robe of raw canvas, relief of cassock, with lstro of greasy dirt on the abdomen lies, and in the head a raido bonnet.