Secondary lymphoid tissues are arranged as a series of filters monitoring the contents of the extracellular fluids, i.e. lymph, tissue fluid and blood. The lymphoid tissue filtering each of these fluids is arranged in different ways. Secondary lymphoid tissues are also where lymphocytes are activated. These include: lymph nodes, tonsils, spleen, Peyer's patches and mucosa associated lymphoid tissue (MALT).
What is a text editor? A text editor is a computer program that allows you to create and edit files that contain plain text. This is very different than a robust word processing program like Microsoft Word, Apple Pages, or Google Docs, because they add special formatting thatâs hidden to the user.
On Mac, the most popular text editor is BBEdit (of which TextWrangler is a free version). Every Windows installation comes with Notepad, but some excellent replacements to consider are Notepad2, Notepad++, and TextPad. On Linux/Unix, many opt for using GEdit or Kate, although others opt for JOE or another editor.