MODERN EDUCATION AND DEVELOPMENT
Выпуск журнала №-23
Часть–3_ Апрель –2025
195
LUNG PHYSIOLOGY AND ITS FUNCTIONS
Ruzieva Gulchekhra Atoevna
Afshonа Technical College of Public Health named after Abu Ali Sino -
generalprofessional teacher of natural sciences
Avezova Nafisa Najmiddinovna
Afshona is a teacher of the department of pharmacology at the Technical
College of Public Health named after Abu Ali Sino
Abstract The lungs play a fundamental role in gas exchange, ensuring oxygen
uptake and carbon dioxide removal from the bloodstream. They also contribute to pH
regulation, immune defense, and metabolic functions. This article explores the
physiology of the lungs and their essential functions.
Keywords : Lung, fundamental role.
Introduction
The lungs are paired organs located in the thoracic cavity,
protected by the rib cage and the pleural membrane. They are responsible for
oxygenating blood and expelling carbon dioxide through a process known as
respiration. The lungs work in coordination with the cardiovascular system to sustain
cellular metabolism and homeostasis.
Respiratory Mechanism
Lung ventilation involves two main phases:
Inhalation (Inspiration):
The diaphragm and intercostal muscles
contract, increasing thoracic volume and decreasing intrapulmonary pressure,
allowing air to enter the lungs.
Exhalation (Expiration):
The diaphragm relaxes, reducing thoracic
volume and increasing pressure, forcing air out.
Gas Exchange and Transport
Gas exchange occurs in the alveoli, tiny sacs
surrounded by capillaries. Oxygen diffuses into the blood, binding to hemoglobin,
while carbon dioxide diffuses out for exhalation. Partial pressure gradients drive this
process, maintaining efficient oxygenation of tissues.
MODERN EDUCATION AND DEVELOPMENT
Выпуск журнала №-23
Часть–3_ Апрель –2025
196
Regulation of Respiration
Respiration is controlled by the brainstem,
primarily the medulla oblongata and pons. Chemoreceptors detect changes in blood
pH, oxygen, and carbon dioxide levels, adjusting the respiratory rate accordingly.
Other Functions of the Lungs
1.
pH Regulation:
The lungs help maintain acid-base balance by
modulating CO₂ levels.
2.
Immune Defense:
The respiratory system contains cilia and mucus that
trap pathogens, preventing infections.
3.
Metabolic Functions:
The lungs participate in converting angiotensin I
to angiotensin II, which regulates blood pressure.
Conclusion
The lungs are vital for respiration and overall homeostasis.
Understanding lung physiology is essential for diagnosing and treating respiratory
diseases such as asthma, COPD, and pneumonia. Continued research on pulmonary
function can lead to advancements in respiratory medicine.
REFERENCES
1.
West, J. B. (2020).
Respiratory Physiology: The Essentials
. Wolters Kluwer.
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Hall, J. E., & Guyton, A. C. (2020).
Guyton and Hall Textbook of Medical
Physiology
. Elsevier.
3.
Levitzky, M. G. (2018).
Pulmonary Physiology
. McGraw-Hill.
4.
Nadel, J. A., & Barnes, P. J. (2019).
Textbook of Respiratory Medicine
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Elsevier.
5.
Lumb, A. B. (2021).
Nunn's Applied Respiratory Physiology
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