What were characteristics of an Athenian direct democracy

The Athenian democracy advanced about the time of the fifth century or before Christ in the Greek city state known to may people today as polis of Athens comprising the city of Athens and the all around or surrounding grounds of Attica which is known as the first democracy in the world other Greek city set up democracies most being guided by the Athenian model but know are even reliantly close to the well documented Athens