Endocrine and Nervous system
Endocrine system: releases signaling molecules (hormones) into the bloodstream by endocrine cells that reach all locations in the body. Hormones may have an effect in a single location or in sites throughout the body. Hormones are slow acting but the effects are long-lasting. Good for gradual changes like growth and development, reproduction, metabolic processes and digestion.
Nervous system: each signal (nerve impulse) travels to a target cell along axons. Only neurons, muscle cells, endocrine cells and exocrine cells can receive signal. They can only travel thought a pathway. Transmition is very fast and last only a fraction of a second. Good for direct immediate and rapid responses to environment like movement and behavior.