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.
Thrillers generally keep the audience on the edge of their seats as the plot builds towards a climax. The cover-up of important information from the viewer is a common element. Literary devices such as red herrings, plot twists, and cliffhangers are used extensively.