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Related Concept Videos

Overview of the Vascular System01:20

Overview of the Vascular System

The vascular system comprises an extensive network of arteries, capillaries, and veins. The vascular system can be broadly divided into the blood and lymphatic systems. Typically, blood vessels can be categorized into three histological regions: tunica intima, tunica media, and tunica adventitia. The tunica intima consists of a single layer of endothelial cells attached to the basal lamina. Underlying the basal lamina is a connective tissue layer and an elastic lamina that gives stability and...
Regulation of Angiogenesis and Blood Supply01:24

Regulation of Angiogenesis and Blood Supply

Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits.  Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl hydroxylase and factor...
Mechanism of Angiogenesis01:10

Mechanism of Angiogenesis

Blood vessel formation starts early during embryonic development, around day 7. In the extraembryonic yolk sac, mesodermal precursor cells called hemangioblast proliferate and differentiate into angioblast. Angioblasts express vascular endothelial growth factor receptor 2 or VEGFR2, which binds VEGF-A, a proangiogenic factor, guiding blood vessel formation. VEGF signaling promotes angioblasts to form a blood island in the developing embryo. Angioblasts further differentiate, giving rise to...
Vascular Resistance01:20

Vascular Resistance

Vascular resistance is a critical concept in understanding blood flow dynamics in the circulatory system. It refers to the resistance that blood encounters as it flows through the blood vessels. This resistance is a key factor in determining blood pressure and cardiac workload.
The primary determinants of vascular resistance are vessel diameter, blood viscosity, and vessel length. Among these, vessel diameter plays the most significant role due to the fourth power relationship described by...
Anatomy of Blood Vessels01:20

Anatomy of Blood Vessels

The vascular system, an integral part of the circulatory system, comprises various blood vessels that play crucial roles in maintaining the body's homeostasis. These blood vessels form a complex and efficient circulatory network. The three primary categories of blood vessels are the arteries, veins, and capillaries.
Arteries
Arteries circulate oxygenated blood from the heart, except the pulmonary artery, which transports deoxygenated blood to the lungs. Large arteries, such as the aorta, have...
Structure of Blood Vessels01:15

Structure of Blood Vessels

Blood is circulated throughout the human body through a network of blood vessels called the circulatory system. This system includes arteries that transport blood from the heart to various body parts. These arterial pathways divide into smaller vessels until they reach the arterioles, which further split into capillaries. It is within these minuscule capillaries that the exchange of nutrients and waste products takes place. After this exchange, the blood is collected by venules, which fuse to...

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Related Experiment Video

Updated: Jun 22, 2026

In Vivo Vascular Permeability Detection in Mouse Submandibular Gland
07:10

In Vivo Vascular Permeability Detection in Mouse Submandibular Gland

Published on: August 4, 2022

Vascular biology and vasculitis.

Caroline O S Savage1

  • 1Renal Immunobiology, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK. c.o.s.savage@bham.ac.uk

APMIS. Supplementum
|June 12, 2009
PubMed
Summary

Autoimmune disorders involving anti-neutrophil cytoplasm antibodies (ANCA) cause blood vessel wall inflammation. Understanding ANCA

Area of Science:

  • Immunology
  • Pathology
  • Vascular Biology

Background:

  • Autoimmune disorders can cause inflammation of blood vessel walls.
  • Anti-neutrophil cytoplasm antibodies (ANCA) are associated with these conditions.
  • Neutrophils and anti-endothelial cell antibodies contribute to vascular damage.

Purpose of the Study:

  • To understand the molecular mechanisms of ANCA-associated vasculitis.
  • To elucidate the role of neutrophils in vascular injury.
  • To identify targets for improved therapies.

Main Methods:

  • Analysis of molecular interactions in ANCA-associated vasculitis.
  • Investigation of neutrophil recruitment and activation pathways.
  • Study of endothelial cell responses to immune mediators.

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Micropatterning and Assembly of 3D Microvessels
13:05

Micropatterning and Assembly of 3D Microvessels

Published on: September 9, 2016

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Last Updated: Jun 22, 2026

In Vivo Vascular Permeability Detection in Mouse Submandibular Gland
07:10

In Vivo Vascular Permeability Detection in Mouse Submandibular Gland

Published on: August 4, 2022

Micropatterning and Assembly of 3D Microvessels
13:05

Micropatterning and Assembly of 3D Microvessels

Published on: September 9, 2016

Main Results:

  • ANCA-associated vasculitis involves dysregulated neutrophil behavior at the vessel wall.
  • Cytokine-activated endothelium recruits neutrophils, leading to endothelial apoptosis and denudation.
  • Anti-endothelial cell antibodies can exacerbate vascular injury.

Conclusions:

  • Understanding the interplay between ANCA, neutrophils, and vascular damage is crucial.
  • Targeting these molecular mechanisms may lead to more focused therapeutic strategies.
  • Further research into ANCA-associated vasculitis can improve patient outcomes.