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Related Concept Videos

Peritoneum01:21

Peritoneum

3.9K
The peritoneum is a vital membrane that lines the abdominal cavity and covers most of the organs within it. It plays a crucial role in protecting the organs, providing a smooth surface for their movement, and facilitating various physiological processes. Understanding the anatomy and function of the peritoneum is essential for comprehending the complexities of the abdominal region.
Anatomy of the Peritoneum
The peritoneum is divided into two layers: the parietal peritoneum and the visceral...
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T Cell Types and Functions01:24

T Cell Types and Functions

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When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
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Renewal of Intestinal Stem Cells01:23

Renewal of Intestinal Stem Cells

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The intestinal epithelial lining rapidly renews every 4 to 5 days. The renewal is facilitated by intestinal stem cells (ISCs) located at the base of the crypt– a gland located at the bottom of each villus. ISCs divide asymmetrically to form new stem cells and progenitor daughter cells. The daughter cells are called transit-amplifying (TA) cells which move upwards along the crypt and either differentiate into absorptive cells– the enterocytes or secretory cells– including the...
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Cytotoxic T Cells-mediated Immune Response01:27

Cytotoxic T Cells-mediated Immune Response

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Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
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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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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: Sep 1, 2025

Isolation of Mouse Peritoneal Cavity Cells
04:32

Isolation of Mouse Peritoneal Cavity Cells

Published on: January 28, 2010

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T cells in the peritoneum.

Sanjay Rathod1

  • 1Department of Immunology, University of Pittsburgh, Pittsburgh, PA, United States.

International Review of Cell and Molecular Biology
|August 14, 2022
PubMed
Summary
This summary is machine-generated.

The omentum

Keywords:
Immune cellsOmentumPeritoneal cavityT-lymphocytesTumor metastasis

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Area of Science:

  • Immunology
  • Anatomy

Background:

  • The peritoneal cavity houses abdominal organs and contains the omentum, a visceral adipose tissue with unique lymphoid-like structures called milky spots.
  • Leukocytes patrol the peritoneal cavity, interacting with pathogens and contributing to immune responses.
  • T cells are crucial for adaptive immunity in the peritoneum, regulating responses to maintain homeostasis.

Purpose of the Study:

  • To outline the anatomy relevant to T cell function within the peritoneal cavity.
  • To detail T cell biology, including antigen processing, presentation, and activation.
  • To describe T cell subpopulations and their roles in peritoneal infections and cancer.

Main Methods:

  • Review of anatomical structures relevant to peritoneal immunity.
  • Discussion of immunological processes governing T cell responses in the peritoneum.
  • Analysis of T cell subpopulations and their functions in disease contexts.

Main Results:

  • The omentum's milky spots serve as sites for leukocyte surveillance and immune cell activation.
  • Peritoneal stromal and mesothelial cells uniquely regulate leukocyte recruitment and activation during homeostasis disruption.
  • T cells in the peritoneum exhibit distinct behaviors and functions influenced by the peritoneal environment.

Conclusions:

  • The peritoneum offers a specialized microenvironment for T cell-mediated immune responses.
  • Understanding peritoneal T cell biology is essential for addressing inflammation, infection, and cancer.
  • The omentum plays a significant role in orchestrating immune surveillance and response within the peritoneal cavity.