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Related Concept Videos

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...
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...
Arteries and Arterioles01:16

Arteries and Arterioles

Arteries, the vasculature responsible for transporting blood from the heart, possess robust walls capable of enduring the elevated pressures exerted by the heartbeat. Arteries near the heart are especially thick-walled and enriched with elastic fibers across their three tunics, classifying them as elastic or conducting arteries. These arteries, usually with a diameter exceeding 10 mm, are characterized by their ability to dilate in response to the blood pumped from the heart's ventricles and...
Veins01:17

Veins

Veins are an integral part of our circulatory system, serving as the blood vessels that transport blood from all body regions to the heart. They are a network of hollow tubes that carry blood low in oxygen from the body's cells back to the heart for reoxygenation. Veins are crucial for maintaining the body's overall fluid balance and the continuous circulation of blood.
Structure of Veins:
The structure of veins is specifically designed to assist in the low-pressure transportation of blood...
Veins as Blood Reservoirs01:10

Veins as Blood Reservoirs

Veins, while chiefly responsible for circulating blood back to the heart, also function as storage vessels for blood. They house approximately 64 percent of the body's total blood volume, a feat made possible by their high capacitance—the inherent ability to expand and accommodate large volumes of blood, even under low pressure. The large diameter and thin walls of veins augment their distensibility, significantly more so than arteries, due to their classification as capacitance vessels. When...
Overview of Blood Vessels01:14

Overview of Blood Vessels

The human cardiovascular system comprises five primary types of blood vessels: arteries, arterioles, veins, venules, and capillaries, each serving unique functions.
Arteries and Arterioles: Arteries are muscular and elastic vessels that primarily carry oxygenated blood from the heart to body tissues, except for the pulmonary artery, which carries deoxygenated blood. They have thick walls to withstand high pressure and contain a layer of muscle tissue, allowing them to expand or contract as...

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Updated: May 11, 2026

Multilevel Microdissection and Functional-Structural Profiling of Human Renal Arterial Branches
06:51

Multilevel Microdissection and Functional-Structural Profiling of Human Renal Arterial Branches

Published on: September 5, 2025

Renal vascular structure and rarefaction.

Alejandro R Chade1

  • 1The Department of Physiology and Biophysics, Center for Excellence in Cardiovascular-Renal Research, University of Mississippi Medical Center, Jackson, Mississippi, USA. achade@umc.edu

Comprehensive Physiology
|May 31, 2013
PubMed
Summary
This summary is machine-generated.

Renal microvascular rarefaction, a loss of small blood vessels, impairs kidney function and is linked to diseases like diabetes and hypertension. Therapies targeting kidney microcirculation show promise for protection.

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Area of Science:

  • Nephrology
  • Cardiovascular Biology
  • Microcirculation Research

Background:

  • The microcirculation is essential for organ health, supplying oxygen and nutrients while removing waste.
  • Microvascular rarefaction, the loss of small blood vessels, can impair organ function and initiate disease.
  • The kidney, despite high blood flow, is susceptible to microvascular rarefaction.

Purpose of the Study:

  • To explore mechanisms causing renal microvascular rarefaction.
  • To examine consequences of rarefaction on kidney function and damage progression.
  • To discuss potential renoprotective strategies targeting renal microcirculation.

Main Methods:

  • Review of experimental and clinical evidence.
  • Analysis of associations between rarefaction and cardiovascular diseases (diabetes, hypertension, atherosclerosis).
  • Evaluation of emerging therapeutic approaches using progenitor cells and angiogenic cytokines.

Main Results:

  • Renal microvascular rarefaction is linked to diabetes, hypertension, and atherosclerosis, acting as both cause and consequence.
  • Experimental data suggests progenitor cells and angiogenic factors can modify rarefaction.
  • Targeting renal microcirculation may offer renoprotective benefits.

Conclusions:

  • Understanding renal microvascular rarefaction mechanisms is crucial for managing kidney disease.
  • Therapeutic targeting of the renal microcirculation holds potential for preventing or slowing kidney damage.
  • Further research into renoprotective strategies is warranted.