Compare and contrast the capillaries, arteries, and veins with the help of suitable diagrams.

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Solution

Blood vessels
Arteries, veins, and capillaries are blood vessels.
Blood vessels are an important component of the human circulatory system. They are hollow tubular structures that carry blood to all parts of the body.
Blood vessels carry oxygen, carbon dioxide, nutrients, hormones, water, and waste products.
Contrasting characteristics of blood vessels
Characteristics Arteries Veins Capillaries
Functions Carry blood away from the heart to various parts of the body. Carry blood toward the heart from different parts of the body. Exchange of substances with tissues.
Diameter of the lumen Narrow Wide Extremely narrow; width of one cell.
Nature of blood Oxygenated blood; except in pulmonary artery. Deoxygenated blood; except in pulmonary vein. Both oxygenated and deoxygenated blood.
Wall thickness Thick Thin Extremely thin; one cell thick.
Blood flow pattern In jerks or spurts Smoothly Slowly
Muscle and elastic fibres High amount Low amount None
Valves No Yes No
Summary

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Similar questions

Differentiate between arteries, veins and capillaries.

the blood vessels which permit exchange of materials between blood and tissues are

a) capillaries only

b) capillaries and veins

c) capillaries,veins and arteries

d) capillaries and arteries

Why blood capillaries are important for both arteries and veins?

Collect oxygenated blood from artery and return de-oxygenated blood to vein

Collect de-oxygenated blood from artery and return oxygenated blood to vein

Collect pathogens from veins and release into artery

Collect white blood cells from artery and pour it into vein

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Characteristics	Arteries	Veins	Capillaries
Functions	Carry blood away from the heart to various parts of the body.	Carry blood toward the heart from different parts of the body.	Exchange of substances with tissues.
Diameter of the lumen	Narrow	Wide	Extremely narrow; width of one cell.
Nature of blood	Oxygenated blood; except in pulmonary artery.	Deoxygenated blood; except in pulmonary vein.	Both oxygenated and deoxygenated blood.
Wall thickness	Thick	Thin	Extremely thin; one cell thick.
Blood flow pattern	In jerks or spurts	Smoothly	Slowly
Muscle and elastic fibres	High amount	Low amount	None
Valves	No	Yes	No