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The intestine as a fluid propelling system

W A Weems

    Annual Review of Physiology
    |January 1, 1981
    PubMed
    Summary

    Intestinal segments have varying abilities to propel fluid, influenced by intrinsic factors and external controls. These changes in propulsive state can persist long after the initial stimulus is removed.

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    Area of Science:

    • Gastroenterology
    • Physiology
    • Systems Biology

    Background:

    • Intestinal propulsion is crucial for nutrient absorption and waste elimination.
    • Previous studies indicate non-uniform propulsive capabilities along the gastrointestinal tract.

    Purpose of the Study:

    • To dynamically characterize the propulsive ability of intestinal segments.
    • To investigate the influence of intrinsic and extrinsic factors on intestinal fluid propulsion.

    Main Methods:

    • Measuring luminal fluid movement ejected into attached systems.
    • Quantifying the work performed by intestinal segments for fluid transfer.

    Main Results:

    • Propulsive capability varies significantly between different intestinal and colonic segments.
    • External control inputs can alter regional propulsive states.
    • Altered propulsive states can persist for extended periods after stimulus cessation.

    Conclusions:

    • Intestinal propulsion is a complex emergent property of interacting subsystems.
    • Understanding the control mechanisms of intestinal propulsion is in its early stages.
    • Further research is needed to fully elucidate intestinal propulsion and its regulation.

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