Which one of the following blood vessel is single cell in thickness?

Venule

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Arteriole

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Blood capillary

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Artery

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Solution

The correct option is C Blood capillary
Blood capillaries are made up only of endothelial cells. It is a single layer in thickness.
Arteries, Veins, Arterioles and Venules are made up of multiple types of cells in different layers.
So, the correct answer is 'Blood capilary'.

Suggest Corrections

	Column I		Column II
A	Largest isolated single cell	i	Red blood cells
B	Longest cell	ii	White blood cells
C	Round and biconcave	iii	Egg of an ostrich
D	Amoeboid	iv	Nerve cell