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Related Concept Videos

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 System01:23

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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.
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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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Lymphoid Cells and Tissues01:18

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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.
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Lymphatic Vessels and Lymph Transport01:16

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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.
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Detailed Structure and Function of Lymph Nodes01:23

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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.
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Related Experiment Video

Updated: Apr 19, 2026

Isolation of Human Lymphatic Endothelial Cells by Multi-parameter Fluorescence-activated Cell Sorting
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Lymphatic system: an active pathway for immune protection.

Shan Liao1, P Y von der Weid2

  • 1Inflammation Research Network, University of Calgary, Calgary, Alberta, Canada; Snyder Institute for Chronic Diseases, Calgary, Alberta, Canada; Department of Microbiology, Immunology and Infectious diseases, Cumming School of Medicine, Calgary, Alberta, Canada.

Seminars in Cell & Developmental Biology
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Summary

The lymphatic system is crucial for immune responses, guiding immune cells and antigens to lymph nodes. Understanding lymphatic endothelial cells

Keywords:
Antigen deliveryDendritic cell traffickingImmune regulationLymph nodeLymphatic function

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Area of Science:

  • Immunology
  • Lymphatic Biology
  • Cell Biology

Background:

  • Lymphatic vessels are integral to immune responses, facilitating antigen and antigen-presenting cell transport to lymph nodes.
  • Recent research has elucidated the lymphatic system's role in immune response development and regulation.

Purpose of the Study:

  • To review the mechanisms by which the lymphatic system controls immune responses.
  • To discuss the role of lymphatic endothelial cells in initiating and regulating immune responses.

Main Methods:

  • Review of recent scientific literature.
  • Analysis of the morphology and gene expression profiles of lymphatic endothelial cells.

Main Results:

  • The lymphatic system controls immune responses by guiding antigen/dendritic cell entry and trafficking.
  • Lymphatic endothelial cells and lymph node stroma facilitate antigen presentation and lymphocyte exit.
  • These mechanisms are vital for initiating immune responses and maintaining peripheral tolerance.

Conclusions:

  • Lymphatic endothelial cell morphology and gene expression create an efficient pathway for immune initiation.
  • A fundamental understanding of lymphatic system function in immune regulation is essential for disease research.