The great wall of china
Only plant cells have walls
Flight and advanced firearms have essentially made the value of walls as a defensive measure useless.
Red earth is used to build walls. Red earth cleans the walls and makes them shine.
DIATOMS!!!!
Mahjong's inventor was an Asian Princess who was bored and cut out the pieces by hand then carved shapes into them. The idea was for each player to build walls that the other players could not defeat. In the 1920's, the game hit the United States and became quite popular when the shapes were translated and numbers were added to the pieces so they more resembled playing cards.
The consolidation and extension of the walls that became the Great Wall of China was begun by the "First Emperor" Qin Shi Huangdi around 220 BC.
To keep the northern Barbarians
A lot of people think that Qin Xi Huangdi ( or Qin Shi Huangdi) was the one who build the entire wall. Not true! Actually walls were built before that. Apparently the first wall ever build in China was the wall of Qi (not Qin!), build in 400 bc. Although it didn't look the same way like we know the wall from tv or pictures. It was more like a mass of dirt. But Qin Xi Huangdi ordered to connect all of those walls together to create one long wall.
A lot of people think that Qin Xi Huangdi ( or Qin Shi Huangdi) was the one who build the entire wall. Not true! Actually walls were built before that. Apparently the first wall ever build in China was the wall of Qi (not Qin!), build in 400 bc. Although it didn't look the same way like we know the wall from tv or pictures. It was more like a mass of dirt. But Qin Xi Huangdi ordered to connect all of those walls together to create one long wall.
The Great Wall Of China was actually many walls but then Shi Huangdi had constructors build more walls to fill in gaps and the Great Wall Of China was together the wall stretched for 1,4000 miles (2,240 km).
Cellulose, which is a structural component in the cell walls of plants, is made from a long chain of glucose molecules linked together.
The His-Purkinje system is the part of the heart's electrical system that follows the outer walls of the ventricle.
Nervous system and the cardiac walls. (:
One of Shi Huangdi's best-known projects was the construction of the Great Wall of China. Initiated to protect the Qin dynasty from invasions by nomadic tribes, the wall was built using forced labor and connected existing walls. This monumental undertaking not only served a military purpose but also symbolized the strength and unification of the Chinese state under Shi Huangdi's rule. The Great Wall remains one of the most iconic structures in the world today.
Shi Huangdi's armies destroyed city walls and seized weapons from conquered territories to consolidate power and eliminate potential resistance. By dismantling fortifications, they aimed to prevent cities from defending themselves and fostering rebellion. Additionally, disarming the populace reduced the threat of uprisings and ensured greater control over the newly unified empire. This strategy was part of Shi Huangdi's broader efforts to centralize authority and maintain stability across his realm.
Shi huangdi connected the small defensive walls built by the the Zhou, creating one Great Wall that invaders would have to travel halfway across Tibet to be able to enter China.
Shi Huangdi, the first emperor of China, implemented a series of reforms in the cities he conquered, including standardizing measurements, currency, and writing systems to unify the diverse regions under his rule. He often dismantled the walls of conquered cities to prevent rebellion and foster integration into the Qin Empire. Additionally, he promoted the relocation of populations and the establishment of a centralized administrative system to strengthen control over these areas. His policies aimed to create a more cohesive and efficient state, but they also led to significant hardship for many local populations.