Pulmonary Circuit
Pulmonary Circuit - Related Videos
08:17
Murine Echocardiography of Left Atrium, Aorta, and Pulmonary Artery
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Cited by 8 •
2017
The following protocol describes the methodology for the acquisition and analysis of echocardiographic images used to obtain the Left Atrial Volume (LAV), Aorta (Ao) diameter, and Pulmonary Artery (PA) diameter in mice. This technique is a non-invasive, non-terminal procedure that allows assessment of the cardiopulmonary function.
09:27
RC/RL/LC Circuits
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2023
Source: Yong P. Chen, PhD, Department of Physics & Astronomy, College of Science, Purdue University, West Lafayette, IN Capacitors (C), inductors (L), and resistors (R) are each an important circuit element with distinct behaviors. A resistor dissipates energy and obeys Ohm's law, with its voltage proportional to its current. A capacitor stores electrical energy, with its current proportional to the rate of change of its voltage, while an inductor stores magnetic energy, with its voltage...
06:59
Catheter-based Endovascular Angioplasty for Fibrosing Mediastinitis-associated Pulmonary Vein Stenosis
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2025
Pulmonary vein stenosis (PVS) is a life-threatening complication of fibrosing mediastinitis (FM), with a poor prognosis if not properly treated. Currently, catheter-based endovascular angioplasty is a promising therapeutic strategy for FM-associated PVS. This protocol primarily outlines a stepwise approach to the transcatheter procedure for FM-associated PVS.
01:17
Second-Order Circuits
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2024
Integrating two fundamental energy storage elements in electrical circuits results in second-order circuits, encompassing RLC circuits and circuits with dual capacitors or inductors (RC and RL circuits). Second-order circuits are identified by second-order differential equations that link input and output signals. Input signals typically originate from voltage or current sources, with the output often representing voltage across the capacitor and/or current through the inductor. For example, in...
03:01
Drosophila Optogenetics: A Method to Manipulate Neuronal Circuits
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2023
Optogenetics enables the use of light to manipulate neurons that are genetically engineered to express specific opsins–light-sensitive proteins whose light activation triggers a change in the state of the neuron. Here we describe an optogenetic approach in Drosophila using the opsin Channelrhodopsin2. The example protocol features an optogenetics assay set to study the neuronal circuitry behind the fly's escape behavior.
FAQs
Its low-pressure nature supports the movement of blood through the lung circulation while gas exchange occurs at the alveoli. This condition is important because the circuit must deliver blood to capillaries surrounding the air spaces, allowing carbon dioxide to leave the bloodstream and oxygen to enter it before the blood returns to the heart.
Capillaries surrounding the alveoli provide the blood-side surface for diffusion. Carbon dioxide moves from the bloodstream into the air within the alveoli, while oxygen moves in the opposite direction. Positioning the capillaries around the alveoli connects circulation directly with the respiratory surface and helps produce oxygen-rich blood for delivery to the left atrium.
The pulmonary arteries carry deoxygenated blood away from the right ventricle toward the lungs, whereas the pulmonary veins carry oxygenated blood away from the lungs toward the left atrium. Their roles illustrate that artery and vein identify the direction of flow relative to the heart, not simply whether blood contains more or less oxygen.
Blood leaves the right ventricle through the pulmonary arteries and travels to capillaries associated with the alveoli. After carbon dioxide diffuses into the alveolar air and oxygen enters the blood, pulmonary veins return the oxygenated blood to the left atrium. Tracing this sequence clarifies how the heart and lungs operate as a connected exchange pathway.
By replenishing the blood with oxygen in the lungs, the pulmonary circuit helps supply a gas required for cellular respiration. At the same time, it removes carbon dioxide from the bloodstream through alveolar gas exchange. The returned oxygen-rich blood can then enter the systemic side of circulation, linking lung function with the needs of body tissues.
The circuit provides a framework for analyzing problems that impair either blood movement through the lungs or gas exchange at the alveoli. Such impairment can affect the blood’s oxygen and carbon dioxide balance. Studying the pathway helps connect cardiovascular structure, respiratory physiology, and the consequences of disrupted circulation or exchange.