During this era, human technology boomed. In this era, nomads have started farming. Nomads have stopped moving from one place to another. They have started forging metal tools. They also started pastoralism. They have communities and tribe. They were able to create a system on their own.
Answer:
Harvey stated that the veins returned blood to the heart
Explanation:
William Harvey provided proof;
That the theory of blood consumption by the body was not correct.
There are two separate blood flow loops
Blood in the veins flow towards the heart with one way blood flow bw=eing maintained by valves in the blood vessels
The correct option is therefore;
'Harvey stated that the veins returned blood to the heart'
The consequences of the Black Death were numerous and varied. Countless workers died, ravaging families through failed means of survival and causing personal affliction; landowners who used laborers as tenant farmers were also impacted. It is estimated to have abolished 30 percent to 60 percent of the European population.
It was important because it started the American revolution