When it comes to concepts in science, there are two main things that must be kept in consideration. These are interactions and cause and effect. Applying these to any subject or topic at hand is crucial so that something complicated can be broken down into bite-size pieces, or something new can seem familiar if you apply prior knowledge.

An easy example of this can be seen with the caridovscular system, primarily the heart. Almost everyone has at some point or another has taken their heartrate or listened to their heart beat, and even without knowing all the finite details about how it works you know it goes on. When you learn a little bit about the heart, you learn how the process of pumping blood works. Then when you start to get into detailed drawing or description of the process, such as in this cardiovascular lab piece, you can see how everything correlates with regards to hearing your heart beat and what is happening. This is a key example of knowing some interaction may exist, even if the details are not all that clear.

Another example we can observe with regards to cause and effect is how we are able to move. Something as simple as bending your knees or flexing your arm isn't understood by many, yet the action can be done. Once again if we learn just a little bit about how joints help us with movement, it starts to make sense why we are able to do what we do. Take a look at this Movement Lab where two common joints (the elbow and the knee) are talked about, including more information about bones in general and their role in our body. Many may not know much about bones, but you can feel them and know they are there.