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The Entity Modelling Tutorial Part One - Entities, Composition and Context
Examples from Biology
As a further illustration of the notations described so far figures 15 and 16 give examples representing descriptions given in Biology.
- the characteristics of phylum arthropoda are (i) exoskeleton, (ii) body segments grouped into specialized regions (= tagmata) (iii) jointed appendages variously specialized for feeding, locomotion, sensing
Figure 15
an elementary description of phylum arthropoda
Figure 16
You should know:
animal cells have a nucleus, cytoplasm and a cell membrane.
Plant cells also have a cell wall, a vacuole and chloroplasts.