Which of the following cells are round and biconcave in shape?

White blood cells

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Red blood cells

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Columnar epithelial cells

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Nerve cells

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Solution

The correct option is B Red blood cells
In humans, red blood cells are flexible and oval biconcave discs i.e., they are flattened and depressed in the centre, with a dumbbell-shaped cross section and a torus shaped rim on the edge of the disc. This feature of biconcave optimizes the flow of the blood in small vessels like capillaries
Thus, the correct answer is option B.

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Similar questions

Q. Match the following:

	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

Q. Which of the following statements is/are true regarding blood?
(i) Blood is a type of epithelial tissue.
(ii) Blood cells are embedded in an intercellular matrix.
(iii) Blood has a fluid matrix called platelets.

Q. Assertion :Materials cannot be exchanged between epithelial cells. Reason: Blood vessels are absent in epithelial tissue.

Q. Which type of cells have round and biconcave shape?

Ajay went to biology lab and saw some biconcave cells in a blood sample under microscope and were red in color. His teacher also made an announcement that these cells are formed in the bone marrow. What do you think which cells were those?

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