Question

explain primary and secondary lymphoid organ​

Answer 1

Answer:

primary lymphatic organs are thymud and bone marrow which contain either B or T- cells where these are formed and matured ......

secondary lymphoid organs are the spleen,lymph nodes,tonsils, Mucous Associated Lymphoid Tissue (MALT) ,payers patches of small intestine and appendix

hope this helped you....

Answer 2

Answer:

Explanation:

Primary is the main memory of the computer which can be directly accessed by the central processing unit ,

whereas Secondary memory refers to the external storage devices which can be used to store data or information permanently