Lung Physiology
Lung Physiology - Related Videos
05:15
Noninvasive Intratracheal Intubation to Study the Pathology and Physiology of Mouse Lung
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Cited by 21 •
2013
The use of a model that mimics the condition of lung diseases in humans is critical for studying the pathophysiology and/or etiology of a particular disease and for developing therapeutic intervention. Here a noninvasive intratracheal intubation method that can directly deliver exogenous materials to mouse lungs is presented.
05:33
Physiology of the Circulatory System - Concepts
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2019
Homeostasis Conditions in the external environment of an organism can change rapidly and drastically. To survive, organisms must maintain a fairly constant internal environment, which involves continuous regulation of temperature, pH, and other factors. This balanced state is known as homeostasis, which describes the processes by which organisms maintain their optimal internal conditions. To maintain homeostasis, organisms have developed structures with distinct functions. Physiology is the...
05:55
Whole Lung Agarose Inflation: A Method of Preparing Lungs for Ex vivo Live Imaging
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2023
This video describes a method of preparing lungs for ex vivo live imaging to study interactions between cancer cells and stromal cells, using agarose for inflation. In the sample protocol, agarose inflation procedure is described before observing live cellular interactions.
04:50
Direct Tracheal Instillation of Solutes into Mouse Lung
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Cited by 54 •
2010
Intratracheal instillations deliver solutes directly into the lungs. This procedure targets the delivery of the instillate into the distal regions of the lung, and is therefore often incorporated in studies aimed at studying alveoli. We provide a detailed survival protocol for performing intratracheal instillations in mice.
12:50
Procedure for Lung Engineering
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Cited by 43 •
2011
We have developed a decellularized lung extracellular matrix and novel biomimetic bioreactor that can be used to generate functional lung tissue. By seeding cells into the matrix and culturing in the bioreactor, we generate tissue that demonstrates effective gas exchange when transplanted in vivo for short periods of time.
FAQs
Pressure changes generated by the diaphragm and other respiratory muscles create the force that moves air through the airways. When these muscles alter conditions within the respiratory system, air moves into or out of the lungs rather than remaining stationary. This mechanical step supplies the alveoli with fresh air and links muscle activity to subsequent gas exchange.
Gas exchange depends on the thinness of the alveolar-capillary membrane. Oxygen crosses this boundary from the alveolar side into the blood, while carbon dioxide travels in the opposite direction. The membrane therefore provides a short route for diffusion between air and circulating blood, allowing ventilation to contribute directly to oxygen delivery and carbon dioxide removal.
Efficient gas exchange requires coordinated ventilation and pulmonary blood flow. Their integration allows oxygen entering the alveoli to support delivery to the blood while carbon dioxide is transferred in the opposite direction for removal. This coordination matters because either process viewed alone cannot fully explain how the respiratory system optimizes exchange and helps maintain internal balance.
Neural and chemical feedback adjust breathing as carbon dioxide and oxygen levels change. This control system links the composition of the body's internal environment to respiratory activity, helping alter ventilation when gas requirements shift. Studying this regulation explains how breathing responds dynamically rather than operating at a fixed level, which is important for understanding respiratory control.
Lung physiology provides a framework for examining ventilation, alveolar gas exchange, pulmonary blood flow, and feedback regulation. Researchers and clinicians can use these connected principles to interpret respiratory function and organize assessment of health or disease. Linking an observed breathing response or gas-exchange problem to its underlying process supports more meaningful physiological interpretation.
Lung physiology allows exercise performance to be studied through the processes that supply oxygen and remove carbon dioxide. Investigators can consider how ventilation, alveolar-capillary diffusion, pulmonary blood flow, and respiratory feedback work together. This systems-level view connects respiratory function with performance without treating breathing, blood flow, and gas exchange as separate events.