Name: how air moves into the lungs
Uploaded: 2024-06-20T13:02:58.000Z
Duration: 1 min 30 s
Channel: JoVE

호흡계는 전도 영역과 호흡 영역으로 구성됩니다.
비강, 기관 및 기관지를 포함한 전도 영역은 공기가 폐로 전달될 때 공기를 여과, 청소, 데우기 및 가습하는 데 도움이 됩니다.
호흡 영역은 세기관지, 폐포관, 폐포로 구성되어 공기와 혈액 사이의 기체 교환을 가능하게 합니다.
호흡 과정에는 입이나 코를 통해 폐로 공기를 흡입하거나 흡입한 다음 공기를 내쉬는 것이 포함됩니다.
흡기 근육(diaphragm and external intercostal muscle)이 수축할 때 영감이 일어납니다.
횡격막의 수축은 흉강과 흉강을 확장시킵니다. 대조적으로, 외부 늑간 근육의 수축은 갈비뼈와 흉골을 들어 올립니다.
숨을 들이쉬는 동안에는 흉쇄유돌근(sternocleidomastoid), 전방세라근(serratus anterior), 광배근(latissimus dorsi), 소흉근 및 대흉근(pectoralis minor and major), 세라투스 후방상근(serratus posterior superior muscles)과 같은 부속 흡기근(auxiliary inspiratory muscle)도 수축할 수 있습니다.
흡기 근육의 힘과 폐 조직의 탄력성으로 인해 폐의 부피가 커집니다.
결과적으로 폐포 공간 내의 기압이 대기압 이하로 감소하여 폐로 공기 흐름이 발생합니다.

호흡의 메커니즘 i: 흡기

Mechanism of Breathing I: Inspiration

흡기 소개: 호흡기 시스템의 작동 

호흡에 필수적인 네트워크인 호흡계는 전도 구역과 호흡 구역으로 구성되며, 각각은 호흡의 전체 과정에서 중요한 역할을 합니다. 호흡 주기의 첫 번째 단계인 흡기, 즉 흡입의 자세한 메커니즘을 살펴보겠습니다.

 흡기 시 공기의 경로 

흡기 동안 공기는 코나 입을 통해 우리 몸에 들어오고 비강, 기관, 기관지를 포함한 전도 구역을 통해 이동합니다. 이러한 구조는 공기를 여과하고, 따뜻하게 하고, 가습하여 폐로의 이동을 준비하는 데 중요합니다. 공기가 호흡 구역에 도달하면 세기관지, 폐포관을 통과하고 마지막으로 폐포로 들어가 가스 교환이 발생합니다.

 흡기의 근육 역학 
흡기는 일차 흡기 근육(횡격막과 외부 늑간근)의 수축으로 시작됩니다. 
<ul style="padding-left: 35px;">
	<li style="list-style-type:disc;margin-bottom: 8px;"> 횡격막: 횡경막이 수축함에 따라 편평해지고 아래쪽으로 이동하여 흉강을 수직으로 확장합니다.</li>
	<li style="list-style-type:disc;margin-bottom: 8px;"> 외부 늑간근: 이 근육은 갈비뼈와 흉골을 들어 올려 흉강을 확장하고 흉강 내압을 감소시키는 데 도움을 줍니다.</li>
</ul>
운동이나 호흡 곤란과 같은 보다 격렬한 호흡 시나리오에서는 흉강의 확장을 강화하기 위해 보조 흡기 근육이 동원됩니다. 이러한 근육에는 다음이 포함됩니다.

<ul style="padding-left: 35px;">
	<li style="list-style-type:disc;margin-bottom: 8px;">흉쇄유돌근</li>
	<li style="list-style-type:disc;margin-bottom: 8px;">톱니 모양의 전방</li>
	<li style="list-style-type:disc;margin-bottom: 8px;">등받이가 가장 넓음</li>
	<li style="list-style-type:disc;margin-bottom: 8px;" >소흉근과 소흉근</li>
	<li style="list-style-type:disc;margin-bottom: 8px;" >톱니 모양의 후방 상부</li>
</ul>

 폐 확장의 역학 

이들 근육의 조화로운 수축은 폐의 용적을 증가시킵니다. 이러한 팽창은 폐포 내의 압력을 대기압 이하로 감소시켜 공기를 폐로 유도하는 압력 구배를 생성합니다. 폐 조직의 탄력성은 이러한 부피 변화를 돕고 폐포 공간으로의 효율적인 공기 흐름을 보장합니다.

 결론 

근육의 역동적인 상호작용과 영감에 관련된 해부학적 구조를 이해하는 것은 호흡이 삶을 지원하는 방식을 이해하는 데 중요합니다. 이 과정에는 중요한 세포 기능을 유지하는 데 필수적인 효율적인 가스 교환을 보장하는 간단한 공기 흡입과 정교한 생리학적 메커니즘이 포함됩니다.

호흡의 메커니즘 I: 흡기

Introduction to Inspiration: 호흡기 시스템이 작동하는 모습
호흡에 필수적인 네트워크인 호흡계는 전도와 ...

Education

교육

JoVE Core

Nursing

간호학

Unit 1

제1단원

Vital Signs: Respiration

활력 징후: 호흡

KEY TERMS AND CONCEPTS

핵심 용어 및 개념

how air moves into the lungs

Air enters the lungs through a coordinated breathing process called inspiration, or inhalation. This is the first phase of the respiratory cycle. The respiratory system includes the conducting zone and the respiratory zone, and both help move air toward the place where gas exchange occurs.

During inspiration, air comes in through the nose or mouth and passes through the conducting zone. This pathway includes the nasal cavity, trachea, and bronchi. These structures filter, warm, and humidify the air before it continues deeper into the lungs.

The air then moves into the respiratory zone. It passes through the bronchioles and alveolar ducts and reaches the alveoli, the tiny air sacs where gas exchange takes place. This route prepares the body to bring oxygen into the lungs and support respiration.

Inspiration starts when the diaphragm and external intercostal muscles contract. The diaphragm flattens and moves downward, which expands the thoracic cavity vertically. The external intercostal muscles lift the ribs and sternum, which helps enlarge the chest cavity and lowers intra-thoracic pressure.

When breathing becomes more forceful, such as during exercise or respiratory distress, accessory inspiratory muscles can help. These muscles include the sternocleidomastoid, serratus anterior, latissimus dorsi, pectoralis minor and major, and serratus posterior superior. Their added action helps the thoracic cavity expand further.

As the chest expands, lung volume increases. This lowers the pressure inside the alveoli below atmospheric pressure and creates a pressure gradient that pulls air into the lungs. The natural elasticity of lung tissue supports this change and helps air flow efficiently into the alveolar spaces.

How Air Moves Into the Lungs

respiration

Respiratory System and Gas Exchange

The respiratory system supports energy production by bringing oxygen into the body and removing carbon dioxide. In human cells, oxidation uses food molecules and oxygen to produce carbon dioxide and water. This process helps sustain life and depends on the respiratory system. Air moves through a pathway that includes the nose, oropharynx, larynx, trachea, bronchi, bronchioles, and lungs. Air enters through the nose and mouth, passes through the pharynx, and then moves through the larynx, which...

physiological control of respiration

How the Brain Regulates Breathing

How the brain regulates breathing is controlled by the respiratory center in the brainstem. This center manages involuntary breathing, so respirations continue without conscious effort and stay smooth and steady. Ventilation is maintained by monitoring carbon dioxide (CO2), oxygen (O2), and hydrogen ion concentration, or pH, in arterial blood. CO2 is the most important signal in this control system. When CO2 rises, the respiratory control system increases the rate and depth of breathing so...

respiration and gaseous exchange

How Heart and Lungs Exchange Gases

Heart and lung function work together to move oxygen and carbon dioxide through the body. This gas exchange depends on the cardiovascular system, which includes the heart and blood vessels, and on the respiratory system, which brings air to the alveoli and removes waste gases. The heart is a cone-shaped muscular pump at the center of this system. It has four chambers: two atria on top and two ventricles below. The atria receive blood from veins, including the superior and inferior vena cava...

mechanism of breathing i: inspiration

Air enters the lungs through a coordinated breathing process called inspiration, or inhalation. This is the first phase of the respiratory cycle. The respiratory system includes the conducting zone and the respiratory zone, and both help move air toward the place where gas exchange occurs. During inspiration, air comes in through the nose or mouth and passes through the conducting zone. This pathway includes the nasal cavity, trachea, and bronchi. These structures filter, warm, and humidify...

mechanism of breathing ii: expiration

How the Body Pushes Air Out

Expiration is the process of pushing air out of the lungs. It begins when the inspiratory muscles relax. That relaxation starts a chain of changes in the chest and lungs. As the diaphragm relaxes, it moves upward. This lowers the volume of the thoracic cavity, or chest space. The pleural cavity also contracts and presses on the lungs. The intercostal muscles, which sit between the ribs, help during this phase too. They pull the ribs downward and inward. This makes the chest cavity even...

mechanism of breathing iii: the accessory muscles

mechanism-of-breathing-iii-the-accessory-muscles

Accessory Muscles That Support Breathing

Accessory muscles help the respiratory system expand the chest and move air when breathing needs extra effort. The diaphragm is still the main breathing muscle, but other muscles can assist during inhalation and exhalation. This support becomes important during deep breathing or when the body faces breathing challenges. Several accessory muscles help with inhalation. The sternocleidomastoid, which is in the neck, lifts the sternum and helps the chest cavity expand. The scalene muscles also sit...

factors affecting respiration

How Breathing Changes in Different Conditions

Respiration changes with age, activity, health, and the environment. It is the process of exchanging oxygen (O2) and carbon dioxide (CO2) between the body and the surroundings. Many factors can alter how fast and how deeply a person breathes. Newborns usually breathe faster than older children and adults. Their respiratory rate can range from thirty to sixty breaths per minute because their metabolic needs are higher. As people age, metabolic rate often decreases, and breathing tends to slow. <br...

respiratory assessment: purpose and indications

respiratory-assessment-purpose-and-indications

Breathing Checks in Patient Monitoring

Respiratory assessment is a key part of patient monitoring in nursing. It helps detect early signs of clinical deterioration. Breathing changes often appear before other signs of worsening health, so nurses watch respiratory rate, breathing pattern, and breath sounds closely. A complete respiratory assessment goes beyond counting breaths. It includes inspection, which means looking at chest symmetry, effort, and use of accessory muscles. It also includes palpation, or feeling for tenderness,...

assessment of airway, skin color, and use of accessory muscles

assessment-of-airway-skin-color-and-use-of-accessory-muscles

Respiratory Signs to Check During Breathing

Respiratory assessment starts with checking the airway, skin color, and use of accessory muscles during breathing. These signs give quick clues about respiratory status and possible complications. A clear airway, normal skin color, and no accessory muscle use usually point to effective oxygenation and perfusion. Airway assessment is an important first step in any health check. Clinicians look for anything that could block breathing, such as vomit, a foreign object, or the tongue. In a...

assessment of ventilation i: respiratory rate

assessment-of-ventilation-i-respiratory-rate

Checking Breathing Patterns and Respiratory Rate

Ventilation assessment helps monitor a patient’s health status by checking breathing patterns and respiratory rate. Respiration is one of the easiest vital signs to observe. It can also show problems in several body systems, including serious issues such as brainstem injury after head trauma. Accurate assessment depends on unobtrusive observation. The patient should not know they are being watched, because awareness can change breathing patterns. A full evaluation also considers the patient’s...

assessment of ventilation ii: respiratory depth and rhythm

assessment-of-ventilation-ii-respiratory-depth-and-rhythm

Watching Breathing Depth and Rhythm

Breathing depth and rhythm help show how a person is ventilating. Respiratory depth is the amount of air inhaled or exhaled in one breath. It may be shallow or deep, and it usually stays steady when a person is resting or asleep. A deep sigh is an automatic deep breath that fills the lungs with more air than normal breathing. Respiratory depth is checked by watching chest excursion, or chest movement. Deep respiration shows full lung expansion and complete exhalation. Shallow respiration moves...

assessment of diffusion and perfusion

Gas Exchange Checks in Respiratory Care

Gas exchange checks in respiratory care focus on diffusion, perfusion, oxygen saturation, and capnography. These measures help show how well the lungs and blood vessels move oxygen in and remove carbon dioxide from the body. Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration. In the lungs, oxygen diffuses from the alveoli, the tiny air sacs, into the bloodstream. Carbon dioxide, which is made during cell metabolism, moves from the...

respiratory volumes and capacities i

Breathing Rates and Pattern Changes

Breathing rate and rhythm are important signs of respiratory health. A complete one-minute count helps show the patient’s breathing pattern. Even a small rise of three to five breaths per minute can be an early sign of respiratory distress. Patients with a rate above twenty-four breaths per minute need close monitoring for possible changes in body function. Normal and abnormal respirations have clear names. Eupnea means normal, gentle breathing with a regular rate and rhythm, usually twelve to...

alterations in respiration ii

Breathing Patterns and Their Clinical Meaning

Breathing patterns can be regular, deep, or shallow, and they can also become abnormal. These changes help explain how ventilation is affected in different conditions. Clinically, they are important because they can guide patient evaluation. Biot's breathing is irregular in both rate and depth. It alternates between deep gasping breaths and apnea, which is a pause in breathing. It may occur with increased intracranial pressure or damage to the brain's respiratory center, such as from stroke,...

respiratory volumes

Measuring Lung Air Volumes

Respiratory volumes measure how much air moves in and out of the lungs during breathing. These values help assess lung function, support diagnosis of respiratory conditions, and track overall respiratory health. Each measurement gives a different view of how the lungs work. Tidal volume (TV) is the air inhaled or exhaled in one normal breath. In adults, it is about 500 milliliters per breath. It serves as the baseline volume for resting breathing. Minute volume (MV) is the total air exchanged...

respiratory capacities

Lung Capacity Measures in Breathing

Lung capacity measures show how much air the respiratory system can move and hold during different parts of breathing. These measures help describe lung function in a more complete way. They are useful for understanding how the lungs work during inhaling and exhaling. Inspiratory capacity, or IC, is the maximum amount of air that can be inhaled with full effort. It is found by adding tidal volume and inspiratory reserve volume. IC usually ranges from 2.4 to 3.6 liters. Functional residual...

special considerations while measuring oxygen saturation

special-considerations-while-measuring-oxygen-saturation

Checking Breathing Rate and Oxygen Levels

Checking breathing rate and oxygen levels helps assess how well a patient is breathing. Respiratory rate is the number of breaths taken in one minute. Oxygen saturation shows how much oxygen is being delivered to the body’s tissues. Together, these signs give a fuller picture of respiratory function. The normal adult breathing rate is usually 12 to 20 breaths per minute. A lower rate may suggest respiratory depression or decreased oxygen levels. A rate above 20 breaths per minute may point to...

assessment of respiration

Respiratory Assessment Signs and Findings

Respiratory assessment looks at the signs and findings that show how well a person is breathing. It uses both subjective data and objective data to judge respiratory health. The respiratory system’s basic structures and main functions provide the basis for this check. Subjective assessment starts with an interview. Nurses ask about medical history, medicines, current symptoms, past respiratory problems like asthma or COPD, surgeries, and allergies. Family history also matters because it can...

key terms and concepts

Explore how inspiration works as the diaphragm, rib muscles, and accessory muscles expand the chest and draw air into the alveoli for gas exchange.

How Air Moves Into the Lungs | JoVE K12

JoVE Core Nursing offers concise animated lessons on nursing practices, covering health systems, nursing organizations, and health concepts. It includes practical communication, infection prevention, and nursing fundamentals, providing students with a clear understanding of nursing principles.

nursing

How Air Moves Into the Lungs

Description

Transcript