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### College Physics (Urone)

Book edition 1st Edition
Author(s) Paul Peter Urone
Pages 1272 pages
ISBN 9781938168000

# The elastic properties of the arteries are essential for blood flow. Explain the importance of this in terms of the characteristics of the flow of blood (pulsating or continuous).

Arteries are very thin compared to their diameter when the heart contracts and pumps blood out of these vessels, the walls need to stretch to accommodate the blood upward, to store energy.

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## Definition of blood

Plasma, blood cells, and platelets make up blood, which is the bound material of fluid.

## Explaining importance of arteries for blood flow

In physics, when a material or object is stretched or compressed through an external force then elasticity is the ability of the material or object to regain its shape after the removal of a load.

Blood vessels are elastic to support the pressure difference of the blood pumped by the Heart. This elastic property is essential for blood flow. Blood is carried from the heart to the organs through the arteries.

Arterial pressure increases and the walls of the arteries stretch as blood is pumped out of the heart. When the arterial valve closes, the pressure in the arteries drops, and the walls of the arteries relax to maintain blood flow.

If the arteries were rigid, you wouldn’t feel the pulse.

Arteries are very thin compared to their diameter when the heart contracts and pumps blood out of these vessels, the walls need to stretch to accommodate the blood upward, to store energy.

Arteries are under higher pressure than veins and therefore need to be more distensible, which is provided by the elastic fibres.