Conducting system of the heart: structure, function and anatomical-physiological features

Date:

2018-07-25 04:00:21

Views:

942

Rating:

1Like 0Dislike

Share:

Table of contents:

An Important feature of cardiac muscle is the automaticity of contractions. The heart, which is based on the sequential contractions and relaxation of muscular tissue of the Atria and ventricles, conduction is governed by nerve impulses cell structure with a complex structure.

conducting system of the heart

Conducting system of the heart is the most important mechanism to ensure the functioning of the human body, consisting of a pulse generator (pacemaker) and some complex structures intended for the innervation of the cycles of the myocardium. Consisting of cellular structures, which is based on the work of R-cells and T-cells, it is intended to initiate a heartbeat and coordinate contraction of the heart chambers. The first type of cells has an important physiological function of automatie – the ability to rhythmic contraction without an explicit regard to the impact of any external stimuli.

T cells, in turn, have the ability to transmit the contractile impulse generated by P-cells to the myocardium, which ensures its smooth operation. Thus, the conducting system of the heart physiology which is based on the smooth interaction of these two groups of cells is a common biological mechanism within the structural heart device.

the conducting system of human heart

Conducting system of the heart consists of several functional components: the sinoatrial and atrioventricular nodes and the bundle branch block with right and left legs, ending with the Purkinje fibers. Sinoatrial (sinus) node located in the right atrium, is a small mass of muscular fibers, elliptical in shape. In this component, which starts conducting system of the heart, originate nerve impulses, causing a contractile response of the heart. Normal automaticity sinoatrial node is considered to be from fifty to eighty pulses per minute.

Atrioventricular component located below the endocardium in the posterior segment of the septal, performs an important function by delaying, filtering, and redistribution of incoming pulses generated and sent by the sinoatrial node. Conducting system of the heart performs regulatory and control functions, assigned to it a structural component – atrioventricular node.

 Conducting system of the heart. Physiology

The Need for such functions due to the fact that the wave of nerve impulses, instantly spreading through the system of the Atria and causing them to return the contractile response, immediately to enter the ventricles of the heart are not able to, because the myocardium of the Atria separated from the ventricles by fibrous tissue that does not transmit nerve impulses. And only in the region of the atrioventricular node, such an insuperable barrier was missing. This causes the wave pulse to find a way to aspire to this important component, where it is their uniform distribution over the entire cardiac apparatus.

Conducting system of the heart also contains in its structure a bundle branch block that connects atrial and ventricular myocardium and Purkinje fibers, which form synapses on cardiomiotitah cells and providing the necessary pairing of muscle contraction and nerve excitation. Essentially these fibers are the final branching of the bundle branch block that is attached to the upper subendocardialnah plexus of the ventricles of the heart.


Article in other languages:

AR: https://www.tostpost.com/ar/health/9941-conducting-system-of-the-heart-structure-function-and-anatomical-physi.html

BE: https://www.tostpost.com/be/zdaro-e/17841-yakaya-pravodz-c-s-stema-serca-budova-funkcy-anatama-f-z-yalag-chnyya-.html

DE: https://www.tostpost.com/de/gesundheit/17850-das-leitungssystem-des-herzens-die-struktur-die-funktion-und-die-anato.html

ES: https://www.tostpost.com/es/la-salud/17865-desarrolla-el-sistema-del-coraz-n-estructura-funciones-y-anatomo-fisio.html

HI: https://www.tostpost.com/hi/health/9944-conducting-system-of-the-heart-structure-function-and-anatomical-physi.html

JA: https://www.tostpost.com/ja/health/9943-conducting-system-of-the-heart-structure-function-and-anatomical-physi.html

KK: https://www.tostpost.com/kk/densauly/17841-zh-rekt-tk-zg-sht-k-zh-yes-rylymy-funkciyalary-zh-ne-anatomo-fiziologi.html

PL: https://www.tostpost.com/pl/zdrowie/17817-przewodzeniowy-system-serca-budowa-funkcje-i-cechy-anatomiczne-i-fizjo.html

PT: https://www.tostpost.com/pt/sa-de/17816-condutora-sistema-de-cora-o-estrutura-fun-o-e-anatomo-caracter-sticas-.html

TR: https://www.tostpost.com/tr/sa-l-k/17847-letken-sistemi-kalp-yap-fonksiyon-ve-anatomik-ve-fizyolojik-zellikleri.html

UK: https://www.tostpost.com/uk/zdorov-ya/17831-prov-dna-sistema-sercya-budova-funkc-ta-anatomo-f-z-olog-chn-osoblivos.html

ZH: https://www.tostpost.com/zh/health/10773-conducting-system-of-the-heart-structure-function-and-anatomical-physi.html






Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

Comments (0)

This article has no comment, be the first!

Add comment

Related News

Electronic cigarette eGo CE4. The description of the product and its main characteristics

Electronic cigarette eGo CE4. The description of the product and its main characteristics

Electronic Smoking recently very popular. A new method, open more than ten years ago by the Chinese hon lik a interested many people. Over time, unusual machines and accessories have been producing in many countries. One of the be...

Inflammation of Bartholin gland

Inflammation of Bartholin gland

Inflammation of the Bartholin's gland, also known as bartholinitis, is a disease that is an inflammation of the large glands situated on the eve of the vagina. The most frequent causes of its occurrence are prenebrezhenie elementa...

How dangerous is goiter in a child: symptoms, signs, prevention and treatment

How dangerous is goiter in a child: symptoms, signs, prevention and treatment

Under the dysbiosis refers to a quantitative violation of the indigenous intestinal microflora, leading to the development of atypical or opportunistic microorganisms. Over the last decade, physicians and scientists argue a lot ab...

Antispasmodic drug

Antispasmodic drug "Dicetel": instructions for use

the Cure "Dicetel" instruction manual describes as an antispasmodic drug that has a pronounced m-holinoblokirutuyu and myotropic effect. The use of this tool allows for a short time to reduce the process of hydrochloric acid in th...

Green feces in infants.

Green feces in infants.

the appearance of the baby in the family requires young mom of solving new problems. For example, moms are wondering why the little green feces and how to prevent colic in a child what to do when teething, to what doctors to ...

What is the difference between hemorrhagic vasculitis?

What is the difference between hemorrhagic vasculitis?

Hemorrhagic vasculitis imply is a disease in which the vascular lesions of the capillaries of the skin, gastrointestinal tract, joints and even kidneys. According to experts, this disease can be diagnosed regardless of patient age...