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Blood Flow

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.

Applications of Integration to Find Blood Flow

Applications of Integration to Find Blood Flow

Blood flow through a cylindrical blood vessel can be mathematically described using the principles of laminar flow, a regime in which fluid moves smoothly in parallel layers. In this model, the velocity of the blood is not uniform across the cross-section of the vessel; rather, it varies with the radial distance from the center. The maximum velocity occurs along the central axis, decreasing progressively toward the vessel walls, where it reaches zero due to viscous drag.Approximating Blood...

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Related Experiment Video

Updated: Apr 4, 2026

Spatial Temporal Analysis of Fieldwise Flow in Microvasculature

Spatial Temporal Analysis of Fieldwise Flow in Microvasculature

Published on: November 18, 2019

Shape analysis of the microcirculatory flow wave.

L Bocchi¹, A Evangelisti, M Barrella

¹Department of Information Engineering, University of Florence, 50121 Florence, Italy.

Physiological Measurement

|September 4, 2015

Summary

This summary is machine-generated.

Aging significantly alters microcirculation waveform dynamics. Laser Doppler flowmetry reveals changes in wave rise time and oscillation fraction, offering new insights into cardiovascular health in older adults.

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Last Updated: Apr 4, 2026

Spatial Temporal Analysis of Fieldwise Flow in Microvasculature

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Published on: November 18, 2019

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Published on: November 3, 2015

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Published on: July 19, 2016

Area of Science:

Physiology
Cardiovascular Medicine
Biomedical Engineering

Background:

Assessing cardiovascular system function non-invasively is vital for clinical and physiological research.
Microcirculation plays a key role in regulating blood flow and tissue oxygenation.
Age-related changes in circulation can impact overall health and disease risk.

Purpose of the Study:

To investigate the detection of microcirculatory flow waveform alterations using non-invasive laser Doppler flowmetry.
To assess the impact of aging on dynamic parameters of the microcirculatory system.
To establish a non-invasive method for evaluating age-related cardiovascular changes.

Main Methods:

Utilized laser Doppler flowmetry for non-invasive measurement of microcirculation.
Warmed skin to a fixed temperature (44 °C) to enhance blood flow during measurements.
Analyzed the shape of the perfusion waveform during each cardiac cycle after flow stabilization.

Main Results:

Identified significant age-related variations in microcirculatory flow waveform parameters.
Observed changes in wave rise time (diastolic minimum to systolic maximum delay) with age.
Found significant alterations in the oscillation fraction (normalized max-min flow difference) related to aging.

Conclusions:

Non-invasive laser Doppler flowmetry can detect age-related alterations in microcirculation waveform dynamics.
Wave rise time and oscillation fraction are sensitive indicators of aging effects on the microcirculatory system.
This method provides a valuable tool for understanding age-related cardiovascular changes non-invasively.