A block is an Ecolego name for the components used in the construction of the mathematical model. Blocks can be visualized using the interaction matrix or box diagrams.

• Expression
• Compartment
• Source Sink

* [[Aggregate|Aggregate]]
* [[Delay|Delay]]
* [[Discrete_event|Discrete Event]]
* [[General_variable|General Variable]]
* [[Index_operation|Index operation]]
* [[Lookup_table|Lookup table]]
* [[Mass balance|Mass Balance]]
* [[Min_Max|Min Max]]
* [[Parameter|Parameter]]
* [[running_mean|Running Mean]]
* [[snapshot|Snapshot]]
* [[time_event|Time Event]]
* [[time_point|Time Point]]
* [[time_series_page|Time Series]]
* [[Transport|Transport]]
  * [[Transport_begin|Transport begin]]
  * [[Transport_end|Transport end]]
  * [[Transport_N|Transport N]]
  * [[Transport_operation|Transport operation]]
* [[Sub-system|Sub-system]]
  * [[Model_input|Model input]]
  * [[Model_output|Model output]]
* [[group|Group]]

• Connector
• Influence
• Transfer

• Blocks window
• Matrix window
• Graph window