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Related Concept Videos

Development of the Lymphatic System01:15

Development of the Lymphatic System

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The development of lymphatic tissues and vessels in embryonic life begins around the fifth week. These structures originate from the mesoderm layer, with lymph sacs emerging from developing veins.
The first lymph sacs to form are the paired jugular lymph sacs located at the junction of the internal jugular and subclavian veins. From these sacs, lymphatic capillary plexuses extend to the thorax, upper limbs, neck, and head, eventually forming lymphatic vessels. Each jugular lymph sac maintains a...
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Lymphatic Vessels and Lymph Transport01:16

Lymphatic Vessels and Lymph Transport

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Lymphatic vessels, known as lymphatics, are crucial in transporting lymph from peripheral tissues to our venous system. This process begins with lymph entering through tiny capillaries that branch through tissues. These capillaries have unique features such as larger diameters, thinner walls, and a distinctive one-way valve system formed by overlapping endothelial cells.
This one-way system allows fluids, solutes, and even pathogens to enter but prevents their return to the intercellular...
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Fluid Connective Tissues: Blood and Lymph01:20

Fluid Connective Tissues: Blood and Lymph

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Blood and lymph are fluid connective tissues. They contain cells, also known as formed elements, circulating in a liquid extracellular matrix, the plasma. The formed elements are derived from hematopoietic stem cells in the bone marrow. Blood and lymph connect all vital parts and carry nutrients, oxygen, and other essential molecules like antibodies.
Blood
The blood flows through blood vessels— arteries, capillaries, and veins. Blood plasma is primarily made of proteins, solutes, and...
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Overview of the Vascular System01:20

Overview of the Vascular System

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The vascular system comprises an extensive network of arteries, capillaries, and veins. The vascular system can be broadly divided into the blood and lymphatic systems. Typically, blood vessels can be categorized into three histological regions: tunica intima, tunica media, and tunica adventitia. The tunica intima consists of a single layer of endothelial cells attached to the basal lamina. Underlying the basal lamina is a connective tissue layer and an elastic lamina that gives stability and...
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Detailed Structure and Function of Lymph Nodes01:23

Detailed Structure and Function of Lymph Nodes

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Lymph nodes are bean-shaped structures that cluster along the lymphatic vessels in the inguinal, axillary, and cervical regions. Each node is divided into compartments by a capsule that extends trabeculae inward.
From a histological perspective, lymph nodes can be split into two main areas: the superficial cortex and the deep medulla. The outer cortex is populated by dendritic cells, macrophages, and B lymphocytes, which are densely packed into follicles. When these B-lymphocytes are presented...
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Development of Blood Vessels01:07

Development of Blood Vessels

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The development of the vascular system in a fetus is a complex and intricate process that begins as early as 15 to 16 days post-conception. This process starts outside the embryo, specifically in the mesoderm of the yolk sac, chorion, and connecting stalk. Approximately two days later, the formation of blood vessels occurs within the embryo itself.
The initial formation of this system is facilitated by the small amount of yolk present in the ovum and yolk sac. Blood vessels originate from...
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Related Experiment Video

Updated: Apr 6, 2026

Isolation of Human Lymphatic Endothelial Cells by Multi-parameter Fluorescence-activated Cell Sorting
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Isolation of Human Lymphatic Endothelial Cells by Multi-parameter Fluorescence-activated Cell Sorting

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Lymphatic vessel development: fluid flow and valve-forming cells.

Tsutomu Kume

    The Journal of Clinical Investigation
    |July 28, 2015
    PubMed
    Summary

    Fluid flow is crucial for lymphatic vessel development and maturation, influencing remodeling and valve formation. Understanding these hemodynamic forces can lead to new treatments for lymphatic disorders.

    Area of Science:

    • Cardiovascular Biology
    • Lymphatic System Research
    • Vascular Development

    Background:

    • Hemodynamic forces significantly impact blood vessel development and disease, including atherosclerosis.
    • The role of fluid flow in the lymphatic circulatory system's formation and maintenance is not well understood.
    • Lymphatic vessels experience fluid flow, but the underlying molecular and cellular mechanisms are largely uncharacterized.

    Purpose of the Study:

    • To investigate the influence of fluid flow on lymphatic vessel development and function.
    • To elucidate the molecular and cellular mechanisms by which hemodynamic forces regulate lymphatic vessels.

    Main Methods:

    • Studies examining the effects of lymph flow on lymphatic vessel remodeling.
    • Research investigating the role of specific genes, such as GATA2, in flow-induced lymphatic development.

    More Related Videos

    Micropatterning and Assembly of 3D Microvessels
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    Micropatterning and Assembly of 3D Microvessels

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    Related Experiment Videos

    Last Updated: Apr 6, 2026

    Isolation of Human Lymphatic Endothelial Cells by Multi-parameter Fluorescence-activated Cell Sorting
    07:36

    Isolation of Human Lymphatic Endothelial Cells by Multi-parameter Fluorescence-activated Cell Sorting

    Published on: May 1, 2015

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    Micropatterning and Assembly of 3D Microvessels
    13:05

    Micropatterning and Assembly of 3D Microvessels

    Published on: September 9, 2016

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    Blocking Lymph Flow by Suturing Afferent Lymphatic Vessels in Mice
    05:59

    Blocking Lymph Flow by Suturing Afferent Lymphatic Vessels in Mice

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    Main Results:

    • Lymph flow is essential for remodeling primary lymphatic vessels, smooth muscle cell distribution, and lymphatic valve development.
    • Flow-induced lymphatic valve formation is initiated by the upregulation of GATA2.
    • GATA2 upregulation is linked to lymphedema in patients with Emberger syndrome.

    Conclusions:

    • Hemodynamic forces play a critical role in lymphatic vessel development and maturation.
    • These findings provide insights into the mechanisms regulating lymphatic vascular networks.
    • Further research may lead to therapeutic strategies for lymphatic disorders.