However, the structure of lymphatic tissues vary according to the particular type of lymphatic tissue or organ they form a part of - (a), (b) or (c) above, and possibly also it's location in the body-especially in the case of (c) Lymph (Fluid).
The exposition is the portion of a story that introduces important background information to the audience; for example, information about the setting, events occurring before the main plot, characters' back stories, etc.
The exposition is the beginning part of a story. It is where we meet the characters, find out the setting, and get the background about the story line. It is the material that sets up whatever will be the central conflict in a story. After the exposition, you have a rising action. After that comes the climax, falling action, and then resolution.