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.
Which editor you choose depends on how much experience you have with computers, what you need it to do, and on which platform you need to do it. 1  If you are new to text editors, I here offer some suggestions on which editor you might find most useful for the tutorials on this site: 1  Windows: TextPad offers a straightforward user experience with a few features to help you along. 2  Mac: BBEdit is the most popular editor for the Mac.