Please find the below steps to create a simple Simulink model in Matlab: Step 1: Open the Simulink function block and add it. Step 2: We have to add the function type in the block. Step 3: Then, click on the block to define the function and its algorithm. Step 4: In the end, we have to test the model.. A subsystem is a set of blocks that you group into a single Subsystem block. Using subsystems: Establishes a hierarchical block diagram, where a Subsystem block is on one layer and the blocks that make up the subsystem are on another. Keeps functionally related blocks together. Helps reduce the number of blocks displayed in your model window.. . "/>Simulink list of blocks