Some plants produce a between the plasma membrane and the primary cell wall.

some plants produce a secondary cell wall between the plasma membrane and the cell wall

= secondary cell wall

Explanation:

clinically, some people often have repeated allergies, eczema and respiratory infections or other parts of the infection, in this case, in addition to some routine tests such as tests for white blood cells, immunoglobulin series, lymphocyte subsets, etc., the five immune immunoglobulin tests are also necessary.