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.
Background. Text structure refers to how the information within a written text is organized. This strategy helps students understand that a text might present a main idea and details; a cause and then its effects; and/or different views of a topic.