The technical report, ISA-TR5.1.01-ISA-TR77.40.01-2012, Functional Diagram Usage, expands upon and illustrates usage of function block symbols and functions, and prepares examples in development of ...

Posey: Their parts all have functions. What do you think a stem ... You could get pupils to draw a diagram of a plant and label the different parts. Alternatively, you could print off pictures ...