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Microservices are not just code modules or libraries â they contain everything from the operating system, platform, framework, runtime and dependencies, packaged as one unit of execution. Each microservice is an independent, autonomous process with no dependency on other microservices. It doesnât even know or acknowledge the existence of other microservices. Microservices communicate with each other through language and platform-agnostic application programming interfaces (APIs). These APIs are typically exposed as Rest endpoints or can be invoked via lightweight messaging protocols such as RabbitMQ. They are loosely coupled with each other avoiding synchronous and blocking-calls whenever possible.
Nerve cells need to be able to send messages to each other quickly and clearly. One way that nerve cells communicate with their neighbors is by sending a burst of small neurotransmitter molecules. These molecules diffuse to the neighboring cell and bind to special receptor proteins in the cell surface. These receptors then open, allowing ions to flow inside. The process is fast because the small neurotransmitters, such as acetylcholine or serotonin, diffuse rapidly across the narrow synapse between the cells.