Gas exchange in tissues and lungs how is?

Date:

2018-04-02 19:30:13

Views:

994

Rating:

1Like 0Dislike

Share:

Table of contents:

To provide cells, tissues and organs with oxygen in the human body there is the respiratory system. It consists of the following organs: nasal cavities, nasopharynx, larynx, trachea, bronchi and lungs. In this article we will study their structure. And also consider gas exchange in tissues and lungs. Define the features of external respiration that takes place between the organism and the atmosphere, and internal, occurring directly at the cellular level.

Why do we breathe?

Most people did not hesitate to answer: to get oxygen. But they don't know why we need it. The answer is simple: oxygen is necessary to breathe. It turns out a vicious circle. Break it will help us biochemistry, studying cellular metabolism.

gas exchange in tissues and lungs

Bright minds who study this science have long come to the conclusion that the oxygen in tissues and organs oxidizes carbohydrates, fats, and proteins. In this form the energy-poor compounds: carbon dioxide, water, ammonia. But the main thing is that as a result of these reactions synthesize ATP-the universal energy substance used by the cell for their livelihoods. We can say that the gas exchange in tissues and lungs will be put to the organism and its structures for the oxidation of oxygen.

Mechanism of gas exchange

It implies the presence of at least two substances whose circulation in the body provides for metabolic processes. In addition to the aforementioned oxygen gas exchange in the lungs, blood and tissues occurs with another connection – with carbon dioxide. It is formed in reactions of dissimilation. Being a toxic substance metabolism, it needs to be removed from the cytoplasm of cells. Consider this process in more detail.

Recommended

"Knowledge is light and ignorance is darkness": the value, meaning and alternatives

There are some sayings that would seem to need no explanation, such as “teaching & ndash; light and ignorance – darkness”. But some still do not understand their meaning. But not only for such people is written by our article. I...

What was invented by Mendeleev for the army. The history and fate of the invention

What was invented by Mendeleev for the army. The history and fate of the invention

D. I. Mendeleev was a brilliant Russian scientist-polymath, who made many important discoveries in various fields of science and technology. Many people know that he is the author of “Fundamentals of chemistry" and the periodic law of chem...

The origin of the Slavs. The influence of different cultures

The origin of the Slavs. The influence of different cultures

Slavs (under this name), according to some researchers, appeared in the story only in 6 century ad. However, the language of nationality bears the archaic features of the Indo-European community. This, in turn, suggests that the origin of the Slavs h...

gas exchange pulmonary gas exchange

Carbon Dioxide by diffusion penetrates through the cell membrane into the interstitial fluid. Because it enters the blood capillaries-venules. Further, these vessels merge, forming the lower and upper hollow veins. They collect blood saturated with CO2. And submit it to the right atrium. With the reduction of its walls a portion of venous blood enters the right ventricle. Here begins the pulmonary (lesser) circulation. Its task is the blood oxygen saturation. Venous blood in the lungs becomes. And CO2, in turn, comes from the blood and is removed to the outside through the respiratory system. To understand how this occurs, we must first study the structure of the lungs. Gas exchange in lungs and tissues is carried out in special structures – the alveoli and the capillaries.

Lung Structure

This pair of organs located in the chest cavity. The left lung consists of two lobes. Right larger. It has three lobes. Through the gate of light they include two bronchi, which, branching, forming a so-called tree. On its branches the air moves in during inhalation and exhalation. Into smaller respiratory bronchioles are the bubbles-the alveoli. They are collected in the acini. Those, in turn, form the pulmonary parenchyma. It is important that each respiratory bottle densely braided capillary network of small and big circles of blood circulation. Bringing branches of the pulmonary arteries, which supply the venous blood from the right ventricle, transporterowych into the lumen of the alveoli carbon dioxide. And efferent pulmonary venules are taken out of the alveolar air oxygen.

the structure of the lungs gas exchange in lungs and tissues

The Arterial blood enters via the pulmonary veins to the left atrium and from there into the aorta. Its branching in the form of arteries to provide the body's cells necessary for internal respiration with oxygen. It is in the alveoli from venous blood becomes arterial. Thus, gas exchange in lung and tissue directly effected by the circulation of blood around small and big circles of blood circulation. This happens due to the continuous muscle contractions of the walls of the heart chambers.

External respiration

It is also called respiration. Is an exchange of air between the external environment and the alveoli. Physiologically correct breath through the nose provide the body with a portion of the air of such a composition: about 21% O2, 0.03 per cent CO2 and 79% nitrogen. In the pneumatic paths he enters the alveoli. They have their own portion of the air. Its composition is the following: 14.2% of O2, of 5.2% CO2, 80% N2. Inhale, and exhale, is regulated in two ways: the nervous and endocrine (concentration of carbon dioxide). Thanks to the stimulation of the respiratory centre of the medulla oblongata, nerve impulses are sent to respiratory intercostal muscles and the diaphragm. The volume of the chest increases. Lightweight, passively moving with contractions of the thoracic cavity expand. The air pressure in them falls below atmospheric. Therefore, the portion of the air from the upper respiratory tract goes to the alveoli.

anatomy and physiology gas exchange in the lungs and tissues

The Exhalation is followed by inhalation. It is accompanied by relaxation of intercostal muscles and raising of the arch of the diaphragm. This leads to a decrease in lung volume. The air pressure in them becomes higher than the atmospheric. And air with excess carbon dioxide rises in the bronchioles. Further, in the upper respiratory tract, it should be in the nasal cavity. Compositionbreath following: 16,3% O2, 4% CO2, 79 N2. At this stage there is external gas exchange. Pulmonary gas exchange performed by the alveoli, provides oxygen to cells needed for internal breathing.

Cellular respiration

Logs in catabolic reactions of metabolism and energy. These processes studies such as biochemistry and anatomy, and human physiology. Gas exchange in lungs and tissues are interrelated and without one another impossible. So, external respiration deliver to interstitial fluid the oxygen and remove from it carbon dioxide. And internal, carried out directly in the cell, its organelles-the mitochondria that provide the oxidative postulirovana and the synthesis of ATP, uses the oxygen for these processes.

gas exchange in the lungs the blood and tissues

Krebs Cycle

The tricarboxylic acid Cycle is the leader in cell respiration. It combines and adapts reactions of oxygen stage of energy exchange and processes involving transmembrane proteins. It also performs the role of supplier of building cell material (amino acids, simple sugars, higher carboxylic acids) formed in the intermediate reactions used by the cell for growth and division. As you can see, this article has studied the gas exchange in lung and tissue, and determined its biological role in the functioning of human body.


Article in other languages:

AR: https://tostpost.com/ar/education/29-gas-exchange-in-tissues-and-lungs-how-is.html

BE: https://tostpost.com/be/adukacyya/48-gazaabmen-u-tkan-nah-legk-h-yak-m-chynam-adbyvaecca.html

DE: https://tostpost.com/de/bildung/45-gasaustausch-im-gewebe-und-lunge-auf-welche-weise-geschieht.html

ES: https://tostpost.com/es/la-educaci-n/50-el-intercambio-de-gases-en-los-tejidos-de-los-pulmones-c-mo-se-realiza.html

HI: https://tostpost.com/hi/education/29-gas-exchange-in-tissues-and-lungs-how-is.html

JA: https://tostpost.com/ja/education/28-gas-exchange-in-tissues-and-lungs-how-is.html

KK: https://tostpost.com/kk/b-l-m/48-gazoobmen-lpalarynda-zh-ne-kpede-anday-zholmen-zh-red.html

PL: https://tostpost.com/pl/edukacja/51-wymiany-gazowej-w-tkankach-i-w-p-ucach-w-jaki-spos-b-si-dzieje.html

PT: https://tostpost.com/pt/educa-o/48-gazoobmen-em-tecidos-leves-e-de-que-forma-acontece.html

TR: https://tostpost.com/tr/e-itim/54-dokularda-gaz-de-i-imi-ve-akci-er-nas-l-oluyor.html

UK: https://tostpost.com/uk/osv-ta/50-gazoobm-n-u-tkaninah-legkih-yakim-chinom-v-dbuva-t-sya.html

ZH: https://tostpost.com/zh/education/21-gas-exchange-in-tissues-and-lungs-how-is.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

Geometry is a branch of mathematics that studies spatial relationships and shapes. The study of geometry in school: features

Geometry is a branch of mathematics that studies spatial relationships and shapes. The study of geometry in school: features

One of the foundations of current knowledge is stored in the familiar to all "geometry". Most remember him from school and binds it with complex shapes, numbers and infinite proof, some work with geometry on a daily basis. Whateve...

Essay on the painting

Essay on the painting "Mika Morozov" by Serov. Portrait

this material is considered, the picture Serov “Mika Morozov”. Get acquainted with the biography of the famous artist. Take a closer look at the painting masters, please share your impressions about the painting. So, l...

Gray forest soils: characterization, formation conditions, properties

Gray forest soils: characterization, formation conditions, properties

In the green massifs, where the forests are of deciduous breeds, the formation of gray forest soils. Natural area of their location - the area of moderate continental climate. These are areas where there is an increased number of ...

Eurasia - the continent which are washed by 4 oceans

Eurasia - the continent which are washed by 4 oceans

This issue can get caught in the tests in geography or in a crossword puzzle: the continent that is washed by the 4 seas? An educated person knows the correct answer. Well, if you do not know, will deal with us.Decoding a geograph...

Analysis of the poem Esenina

Analysis of the poem Esenina "Letter to women". Who is the addressee of the poem?

will analyze the poems "Letter to women". To whom is addressed the poet? And what he wanted to say his piece? Many people wonder: "Who is the addressee of the "Letter to women" Yesenin?". After reading this article, you will know ...

Transitive verb is a... Transitive and intransitive verbs

Transitive verb is a... Transitive and intransitive verbs

Transitivity/eternity is a category on the basis of which we can distinguish the relationship between the subject and object of the action. The meaning of this category is that the subject performs a specific action and its result...