Artery Medical Training Model

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Model Number: NH-55819

Brand: Niche Healthcare

The Artery Section Model is a one-piece, oversized Y artery section with cutaway portions, showing build-up of cholesterol deposits in several locations.

 

SKU: VS4481986 Category: Tag:

Description

Categories         Anatomical Model

Subject               Medical Science

Material              Eco-friendly PVC

Application       School

 

Arteries are blood vessels that carry blood away from the heart to various parts of the body. They have a layered structure that allows them to withstand and regulate high-pressure blood flow. The main components of an artery are:

Tunica Intima:

  • Endothelium: A single layer of flat endothelial cells that lines the interior of the artery. This layer provides a smooth surface for blood flow and releases substances that control vascular relaxation and contraction, as well as enzymes that assist with blood clotting and immune function.
  • Subendothelial Layer: A thin layer of connective tissue that lies just beneath the endothelium.
  • Internal Elastic Lamina: A layer of elastic fibres that separates the tunica intima from the tunica media. It provides elasticity and allows the artery to stretch in response to the pressure of blood pumped from the heart.

Tunica Media:

  • Smooth Muscle Cells: These cells are arranged in concentric layers and are responsible for vasoconstriction (narrowing of the artery) and vasodilation (widening of the artery). This regulation helps control blood pressure and blood flow.
  • Elastic Fibres: These fibres provide the artery with the ability to expand and recoil with each heartbeat, maintaining continuous blood flow.
  • External Elastic Lamina: An additional layer of elastic fibres that separates the tunica media from the tunica externa.

Tunica Externa (Adventitia):

  • Connective Tissue: Composed mainly of collagen and elastin fibres, this outermost layer provides structural support and protection for the artery.
  • Vasa Vasorum: Small blood vessels that supply blood to the walls of larger arteries, providing nutrients and removing waste products from the cells in the artery wall.
  • Nervi Vasorum: Nerves that supply the blood vessels, regulating the contraction and relaxation of the smooth muscle in the tunica media.

These three layers work together to give arteries their strength, elasticity, and ability to regulate blood pressure and flow. The thick walls of arteries help them handle the high pressure of blood ejected from the heart, and their ability to constrict or dilate ensures proper distribution of blood throughout the body.

 

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