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Related Concept Videos

Blood Flow01:29

Blood Flow

Blood is pumped by the heart into the aorta, the largest artery in the body, and then into increasingly smaller arteries, arterioles, and capillaries. The velocity of blood flow decreases with increased cross-sectional blood vessel area. As blood returns to the heart through venules and veins, its velocity increases. The movement of blood is encouraged by smooth muscle in the vessel walls, the movement of skeletal muscle surrounding the vessels, and one-way valves that prevent backflow.
Overview of Systemic and Pulmonary Circulation01:15

Overview of Systemic and Pulmonary Circulation

The systemic and pulmonary circuits are crucial components of the circulatory system, working together to transport blood between the heart, lungs, and the rest of the body. The process begins with pulmonary circulation, where deoxygenated blood is pumped from the right ventricle to the lungs via the pulmonary trunk and arteries. Upon reaching the lungs, the blood becomes oxygenated and returns to the heart, specifically to the left atrium, via the pulmonary veins.
The oxygenated blood is sent...
Structure of Blood Vessels01:15

Structure of Blood Vessels

Blood is circulated throughout the human body through a network of blood vessels called the circulatory system. This system includes arteries that transport blood from the heart to various body parts. These arterial pathways divide into smaller vessels until they reach the arterioles, which further split into capillaries. It is within these minuscule capillaries that the exchange of nutrients and waste products takes place. After this exchange, the blood is collected by venules, which fuse to...
Vascular Resistance01:20

Vascular Resistance

Vascular resistance is a critical concept in understanding blood flow dynamics in the circulatory system. It refers to the resistance that blood encounters as it flows through the blood vessels. This resistance is a key factor in determining blood pressure and cardiac workload.
The primary determinants of vascular resistance are vessel diameter, blood viscosity, and vessel length. Among these, vessel diameter plays the most significant role due to the fourth power relationship described by...
Overview of Pulmonary Circulation01:19

Overview of Pulmonary Circulation

The pulmonary circulation is a vital system in our body that acts as a bridge between the respiratory and cardiovascular systems. It serves as a transport network for deoxygenated blood from the heart to the lungs and then returns oxygen-rich blood back to the heart.
The process begins with the right ventricle of the heart pumping deoxygenated blood into the pulmonary trunk. This large vessel extends about 5 centimeters before splitting into the left and right pulmonary arteries. These arteries...
Anatomy of Blood Vessels01:20

Anatomy of Blood Vessels

The vascular system, an integral part of the circulatory system, comprises various blood vessels that play crucial roles in maintaining the body's homeostasis. These blood vessels form a complex and efficient circulatory network. The three primary categories of blood vessels are the arteries, veins, and capillaries.
Arteries
Arteries circulate oxygenated blood from the heart, except the pulmonary artery, which transports deoxygenated blood to the lungs. Large arteries, such as the aorta, have...

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Regional hypoxic pulmonary vasoconstriction in prone pigs.

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Related Experiment Video

Updated: Jul 28, 2026

Characterization of the Isolated, Ventilated, and Instrumented Mouse Lung Perfused with Pulsatile Flow
10:02

Characterization of the Isolated, Ventilated, and Instrumented Mouse Lung Perfused with Pulsatile Flow

Published on: April 30, 2011

Vascular structure determines pulmonary blood flow distribution.

M P Hlastala1, R W Glenny

  • 1Department of Physiology and Biophysics, University of Washington, Seattle 98195-6522, USA.

News in Physiological Sciences : an International Journal of Physiology Produced Jointly by the International Union of Physiological Sciences and the American Physiological Society
|June 8, 2001
PubMed
Summary

New high-resolution imaging techniques are revolutionizing the study of pulmonary blood flow. These advanced methods provide unprecedented insights into the factors influencing lung circulation, driving rapid scientific progress.

Keywords:
NASA Discipline CardiopulmonaryNon-NASA Center

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Videomorphometric Analysis of Hypoxic Pulmonary Vasoconstriction of Intra-pulmonary Arteries Using Murine Precision Cut Lung Slices

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Quantifying Pulmonary Microvascular Density in Mice Across Lobules
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Related Experiment Videos

Last Updated: Jul 28, 2026

Characterization of the Isolated, Ventilated, and Instrumented Mouse Lung Perfused with Pulsatile Flow
10:02

Characterization of the Isolated, Ventilated, and Instrumented Mouse Lung Perfused with Pulsatile Flow

Published on: April 30, 2011

Videomorphometric Analysis of Hypoxic Pulmonary Vasoconstriction of Intra-pulmonary Arteries Using Murine Precision Cut Lung Slices
13:32

Videomorphometric Analysis of Hypoxic Pulmonary Vasoconstriction of Intra-pulmonary Arteries Using Murine Precision Cut Lung Slices

Published on: January 14, 2014

Quantifying Pulmonary Microvascular Density in Mice Across Lobules
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Published on: January 3, 2025

Area of Science:

  • Physiology
  • Medical Imaging
  • Cardiovascular Science

Background:

  • Scientific advancement relies on novel concepts and methodologies.
  • Understanding pulmonary blood flow determinants saw major progress in the 1960s.
  • Current research is rapidly evolving due to new observational capabilities.

Purpose of the Study:

  • To highlight the impact of new methodologies on scientific knowledge.
  • To emphasize the ongoing transformation in understanding pulmonary blood flow.
  • To underscore the importance of advanced measurement techniques.

Main Methods:

  • Review of historical advancements in pulmonary blood flow research.
  • Analysis of the impact of new imaging technologies.
  • Discussion of enhanced spatial resolution in regional blood flow measurements.

Main Results:

  • Increased spatial resolution of regional pulmonary blood flow measurements is a key driver of current progress.
  • New methodologies are enabling previously unavailable observations.
  • The field of pulmonary blood flow research is experiencing a renaissance.

Conclusions:

  • Methodological innovation is crucial for scientific evolution.
  • Advanced imaging techniques are reshaping our understanding of lung circulation.
  • The current era promises significant new discoveries in pulmonary physiology.