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What is true of leucocytes?...

What is true of leucocytes?

A

These can squeeze out through ( can cross ) the capillary walls

B

These are enucleate

C

Sudden fall in their number indicates cancer

D

These are produced in thymus

Text Solution

Verified by Experts

The correct Answer is:
A
(a) Most of the T and B-lymphocytes ( types of leukocytes ) continuously circulate between the blood and lymph. These leave the blood stream, squeezing out between specialised endothelial cuts found in certain small vessels are enter various tissues including all the lymph nodes.
After percolating through a tissue, these accumulate in small lymphatic vessels which connect to a series of lymph nodes, from where they ultimately enter the main lumphatic vessel ( thoracic duct ) which carries them back into the blood.
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