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相关概念视频

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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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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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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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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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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Functions of the Lymphatic and Immune System01:28

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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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相关实验视频

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Isolation of Human Lymphatic Endothelial Cells by Multi-parameter Fluorescence-activated Cell Sorting
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正常的心脏淋巴系统及其模仿器.

Sarah A Ware1,2, Lirong Zheng1,2, Milad Almasian3

  • 1Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, United States.

American journal of physiology. Heart and circulatory physiology
|November 24, 2025
PubMed
概括

这项研究使用记者小鼠和先进的成像绘制了小鼠心脏中的淋巴血管 (LyVs). 它揭示了LyV的分布,并确定了非特异性淋巴细胞标记物,这对于心血管研究至关重要.

关键词:
在LYVE1中使用.在Prox1-tdTomato中使用.心脏淋巴系统是指心脏淋巴系统.这里是鼠标鼠标鼠标鼠标鼠标鼠标.一个单细胞的单细胞.

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科学领域:

  • 心血管生物学 心血管生物学
  • 淋巴系统研究 淋巴系统研究
  • 发展生物学 发展生物学

背景情况:

  • 淋巴血管 (LyVs) 对于液体平衡和免疫监测至关重要.
  • 心脏LyVs的功能障碍与心血管疾病有关.
  • 在心脏内LyVs的正常解剖分布仍然不太清楚.

研究的目的:

  • 为了全面地绘制LyVs在成年小鼠心脏中的分布.
  • 为了确定特定的心脏解剖部位与LyV存在.
  • 描述心脏淋巴细胞内皮细胞的细胞异质性.

主要方法:

  • 使用Prox1-tdTomato淋巴记者小鼠进行LyV可视化.
  • 采用光板显微镜和冷/振动体切片用于解剖绘制.
  • 对淋巴细胞标记物 (LYVE1,波多普拉宁,VEGFR3) 和单细胞RNA测序 (scRNA-Seq) 进行了免疫染.

主要成果:

  • 在心室上皮心和心脏下部地区发现了广泛的LyV网络.
  • 检测到LyVs在右心室隔膜内心脏,左心房下心脏,心心膜,心房间隔膜,以及心房隔膜节点附近.
  • 在非淋巴细胞中揭示了淋巴细胞标记物 (LYVE1,PROX1) 的非特异表达,并通过scRNA-Seq.识别了六种心脏淋巴内皮细胞亚型.

结论:

  • 提供了心脏LyVs的详细解剖图,作为基础资源.
  • 强调需要验证的多标志物策略来准确识别心脏LyVs.
  • 建立了研究心脏LyVs在健康和疾病中的作用的基础.