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Structure of Blood Vessels

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 Vessels

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,...

Development of Blood Vessels

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The development of the vascular system in a fetus is a complex and intricate process that begins as early as 15 to 16 days post-conception. This process starts outside the embryo, specifically in the mesoderm of the yolk sac, chorion, and connecting stalk. Approximately two days later, the formation of blood vessels occurs within the embryo itself.
The initial formation of this system is facilitated by the small amount of yolk present in the ovum and yolk sac. Blood vessels originate from...

Overview of Blood Vessels

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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...

Lymphatic Vessels and Lymph Transport

Lymphatic Vessels and Lymph Transport

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...

Imaging Studies VII: Vascular Imaging

Imaging Studies VII: Vascular Imaging

DefinitionRenal angiography, also known as renal arteriography, is an imaging technique used to obtain a comprehensive view of blood flow and the vascular structure of blood vessels in the kidneys and surrounding areas.PurposeRenal angiography detects blood vessel abnormalities in the kidneys, such as aneurysms, stenosis, thrombosis, vascular tumors, and renal artery stenosis. It evaluates kidney function and guides interventional treatments like angioplasty or stent placement.Pre-Procedure...

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Related Experiment Video

Updated: Jan 30, 2026

Contrast Enhanced Vessel Imaging using MicroCT

Contrast Enhanced Vessel Imaging using MicroCT

Published on: January 27, 2011

Imaging in small and medium vessel vasculitis.

Manphool Singhal¹, Pankaj Gupta¹, Aman Sharma²

¹Department of Radiodiagnosis and Imaging, Postgraduate Institute of Medical Education and Research, Chandigarh, India.

International Journal of Rheumatic Diseases

|January 31, 2019

Summary

This summary is machine-generated.

This review explores imaging

Keywords:

aneurysms computed tomography computed tomography angiography consolidation ground glass opacities magnetic resonance angiography myocarditis nodules vasculitis

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Area of Science:

Rheumatology and Radiology

Background:

Vasculitis encompasses diverse inflammatory vessel wall disorders, classified by vessel diameter.
Key small vessel types include Granulomatosis with polyangiitis and Henoch-Schonlein purpura.
Medium vessel vasculitis includes Polyarteritis nodosa and Kawasaki disease.

Purpose of the Study:

To review the diagnostic and management role of imaging in small and medium vessel vasculitis.
To discuss specific disease entities within these vasculitis groups.
To highlight the capabilities and limitations of current imaging techniques.

Main Methods:

Review of current literature on imaging modalities for vasculitis.
Focus on Computed Tomography (CT) and Magnetic Resonance Imaging (MRI).
Analysis of imaging findings in relation to specific small and medium vessel vasculitis entities.

Main Results:

Imaging directly visualizes medium vessel vasculitis but is limited for small vessels.
Small vessel vasculitis is assessed via end-organ damage on imaging.
CT and MRI are crucial for evaluating vasculitis, guiding diagnosis and management.

Conclusions:

Imaging is essential for diagnosing and managing small and medium vessel vasculitis.
Understanding imaging's role in specific vasculitis types is critical for patient care.
Advances in imaging continue to improve the evaluation of vasculitis.