When one neuron communicates with another a <em>synapse</em> passes the <em>signals</em> betwen them.
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Answer:
Social structure
Explanation:
Social structure is the stable arrangement of institutions whereby human beings in a society interact and live together.
When you here that term is usually refers WWII and the Nazi's. Concentration camps were basically huge "prisons" or barracks where the Nazi regime placed people deemed undesirable to the Aryan race. It was were a place where these people were labeled by numbers and all there possessions were taken away. There was very little food, and poor sanitary conditions. 11 million people were killed in these camps. 6 million Jews were the greatest number killed. The other 5 million consisted of other types of people that the Nazi's considered undesirable- such as Roma Gypsies, persons with disabilities, homosexuals.
Directly leads to criminal acts
Answer:
Aqueducts
First developed around 312 B.C., these engineering marvels used gravity to transport water along stone, lead and concrete pipelines and into city centers. Aqueducts liberated Roman cities from a reliance on nearby water supplies and proved priceless in promoting public health and sanitation.
Concrete
Many ancient Roman structures like the Pantheon, the Colosseum and the Roman Forum are still standing today thanks to the development of Roman cement and concrete. The Romans first began building with concrete over 2,100 years ago and used it throughout the Mediterranean basin in everything from aqueducts and buildings to bridges and monuments. Roman concrete was considerably weaker than its modern counterpart, but it has proved remarkably durable thanks to its unique recipe, which used slaked lime and a volcanic ash known as pozzolana to create a sticky paste. Combined with volcanic rocks called tuff, this ancient cement formed a concrete that could effectively endure chemical decay. Pozzolana helped Roman concrete set quickly even when submerged in seawater, enabling the construction of elaborate baths, piers and harbors.
