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.
Crucial elements of stories and storytelling include plot, characters and narrative point of view. The term 'storytelling' is used in a narrow sense to refer specifically to oral storytelling and in a looser sense to refer to narrative technique in other media.