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Arteries and veins are joined by a network of .

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Arteries and veins both are blood vessels.
Arteries carry oxygenated blood away from the heart.
Arteries do not have valves.
Artery walls are thicker than veins because blood flows at very high pressure in arteries.
Veins carry deoxygenated blood from all over the body parts to the heart,
Veins have valves.
Vein walls are thinner than arteries because blood flows at a lower pressure than in arteries.
Both arteries and veins are joined by a network of thin blood vessels known as capillaries.
Capillaries are the thinnest blood vessels.

Final answer :-
The correct answer is capillaries.

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