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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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Lymphoid Cells and Tissues01:18

Lymphoid Cells and Tissues

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Lymphoid cells and tissues are integral to the immune system, which is crucial in maintaining our body's defense against harmful pathogens. They form the building blocks of lymphoid organs, which include the spleen, thymus, and lymph nodes.
Lymphoid cells consist of various types of immune system cells. These include B and T lymphocytes, which are responsible for producing antibodies and killing infected cells, respectively. Dendritic cells act as messengers between the innate and adaptive...
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Functions of the Lymphatic and Immune System01:28

Functions of the Lymphatic and Immune System

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The lymphatic system plays a crucial role in bolstering our immune system. It consists of a network of lymphoid organs, lymph, and lymphatic vessels that provide structural and functional support in safeguarding the body against pathogens such as viruses and bacteria.
The primary lymphoid organs, including the bone marrow and the thymus, serve as the maturation sites for lymphocytes. Secondary lymphoid organs, like the mucosa-associated lymphoid tissue, activate these lymphocytes and serve as...
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Introduction to Lymphatic and Immune System01:22

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Immunity is a crucial biological concept about our body's inherent capacity to prevent infections and diseases. A complex network of cells and tissues collectively known as the immune system facilitates this natural defense mechanism. The immune system plays an integral role in maintaining our health and well-being, shielding us from potential health threats.
The immune responses can be categorized into two types: innate and adaptive. Innate immunity comprises nonspecific defenses we are...
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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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Secondary Lymphoid Organs01:15

Secondary Lymphoid Organs

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Secondary organs, including lymph nodes, the spleen, and mucosa-associated lymphoid tissue (MALT), work harmoniously to protect us from disease and infection.
The spleen is a vital organ in the lymphatic system, nestled in the upper left side of the abdomen. It is composed of two primary regions: the red pulp and the white pulp, each having distinct functions. The red pulp performs a significant role in blood filtration. It efficiently purges the blood of old or damaged red blood cells and...
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Related Experiment Video

Updated: Jan 8, 2026

Isolation of Human Lymphatic Endothelial Cells by Multi-parameter Fluorescence-activated Cell Sorting
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A cellular and molecular perspective on organotypic lymphatic (dys)function.

Sanjay Sunil Kumar1, Katharina Uphoff1, Sophie Hötte1

  • 1University of Munster, Medical Faculty, Institute for Cardiovascular Organogenesis and Regeneration, Münster 48149, Germany.

Seminars in Cell & Developmental Biology
|December 16, 2025
PubMed
Summary
This summary is machine-generated.

This review explores molecular mechanisms of lymphatic vessel development and function. It details how genetic disorders and signaling pathways, like VEGFC/VEGFR3, cause lymphedema.

Keywords:
ANG-TIE signalingLymphatic developmentLymphedema syndromeMeningeal lymphaticsSchlemm's CanalVEGFC signaling

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Area of Science:

  • Lymphatic Biology
  • Vascular Development
  • Endothelial Cell Function

Background:

  • The lymphatic vascular system is crucial for fluid balance, lipid absorption, and immune cell transport.
  • Dysfunctional lymphatic endothelial cells can lead to lymphedema and systemic issues.
  • Understanding lymphatic development is key to addressing related diseases.

Purpose of the Study:

  • To review molecular mechanisms driving lymphatic development and vessel formation.
  • To discuss genetic disorders causing primary lymphedema and their underlying signaling pathways.
  • To highlight advancements in meningeal lymphatics and Schlemm's canal biology.

Main Methods:

  • Literature review of molecular mechanisms and signaling cascades.
  • Analysis of human genetic disorders associated with lymphedema.
  • Examination of in vivo disease models for lymphatic development insights.

Main Results:

  • Identified VEGFC/VEGFR3 and ANG/TIE signaling axes as critical for lymphatic development and maturation.
  • Linked specific genetic disorders to primary lymphedema through molecular pathway disruptions.
  • Provided insights into the anatomy and function of meningeal lymphatics and Schlemm's canal.

Conclusions:

  • Molecular signaling pathways are fundamental to lymphatic vessel development, maturation, and function.
  • Genetic defects impacting these pathways lead to lymphedema.
  • Further research into meningeal lymphatics and Schlemm's canal holds potential for disease understanding.