An example of metaphor in science writing:
"In order to keep circulating, RBCs [red blood cells] in the splenic cords are required to squeeze through approximately 2-μm-wide slits in the walls that form the splenic sinuses. Those RBCs unable to make it through are ingested rapidly by local macrophages surveying the area."
Kaufman, Richard (2018) Red Blood Cell Life Span, Senescence, and Destruction, in Edward J. Benz, Nancy Berliner, & Fred J. Schiffman, Anemia. Pathophysiology, Diagnosis, and Management, Cambridge University Press, 19-22.
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Read about examples of science metaphors
Many examples of science metaphors are listed in 'Creative comparisons: Making science familiar through language. An illustrative catalogue of figurative comparisons and analogies for science concepts'. Free Download.