[Study of the lympho- and hemomicrocirculatory bed of lymph nodes by scanning electron microscopy]

Arkhiv Anatomii, Gistologii I Embriologii
|November 1, 1990
PubMed

Insights

This study reveals diverse lymphatic and blood vessel pathways within lymph nodes. Lymphocyte migration routes and the role of reticular tissue in immune responses are highlighted.

Area of Science:

  • Immunology
  • Anatomy
  • Microscopy

Background:

  • The lymphatic and blood systems exhibit complex spatial interrelations within lymph nodes.
  • Understanding these relationships is crucial for comprehending immune responses and lymph transport.

Purpose of the Study:

  • To investigate the spatial organization of lymphatic and blood vessels in lymph nodes.
  • To elucidate the pathways of lymphocyte migration and the function of reticular tissue.

Main Methods:

  • Scanning electron microscopy (SEM) was employed.
  • Corrosive casts and native preparations of lymph node tissues were analyzed.

Main Results:

  • A wide variety of lymph and blood vessel pathways were observed, varying with localization within the lymph node.
  • Specific pathways for lymphocyte migration across cortical and medullary sinuses and postcapillary venules were identified.
  • The involvement of reticular tissue in lymph node immune reactions was noted.

Conclusions:

  • The intricate vascular architecture of lymph nodes supports diverse transport functions.
  • Lymphocyte trafficking and immune cell interactions are facilitated by specific anatomical routes.
  • Reticular tissue plays an integral role in the immune surveillance and response mechanisms within lymph nodes.

Related Concept Videos

Detailed Structure and Function of Lymph Nodes01:23

Detailed Structure and Function of Lymph Nodes

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...
4.2K
Scanning Electron Microscopy01:07

Scanning Electron Microscopy

A scanning electron microscope (SEM) is used to study the surface features of a sample by using an electron beam that scans the sample surface in a two-dimensional manner. Typically, areas between ~1 centimeter to 5 micrometers in width can be imaged. SEM can be used to image bacteria, viruses, tissues as well as larger samples like insects. Conventional SEM gives a magnification ranging from 20X to 30,000X and spatial resolution of 50 to 100 nanometers.
Fundamental Principles
Accelerated...
5.3K
Overview of Electron Microscopy01:25

Overview of Electron Microscopy

The wavelengths of visible light ultimately limit the maximum theoretical resolution of images created by light microscopes. Most light microscopes can only magnify 1000X, and a few can magnify up to 1500X. Electrons, like electromagnetic radiation, can behave like waves, but with wavelengths of 0.005 nm, they produce significantly greater resolution up to 0.05 nm as compared to 500 nm for visible light. An electron microscope (EM) can create a sharp image that is magnified up to 2,000,000X.
12.9K
Immunogold Electron Microscopy01:20

Immunogold Electron Microscopy

Immunoelectron microscopy utilizes immunogold labeling of endogenous proteins with specific antibodies to detect and localize these proteins in cells and tissues. The procedure provides insights into the distribution and quantification of protein under different stimulation conditions offering clues about their functions. Conjugating highly electron-dense gold particles with primary or secondary antibodies allow antigen detection on and within cells, with high resolution and specificity.
5.2K