Answer:
option D: produced its own contractile cycle
Explanation:
option D: produced its own contractile cycle
Autorhythmicity referred to that capability of cells of cardiac muscles that help to beat heart regularly and rhythmically. It is due to that potential which is produced by cells of cardiac muscles. these cells does not required stimulation to beat heart.
autorhythmic cells are generate at sinoatrial and atrioventricular nodes.
Answer:
d make parts flow together and create a sense of unity
Answer:
C) much of Western Europe was United under a single ruler
Explanation:
Charmalagne began his campaign to obtain new territories for his new kingdom in the late 700s.
His conquests were successful. As soon as he defeat foreign territories, he transform them into one of their own and placed the Men he trust to take care of the new territories. In early 800s, he managed to unite the majority of western and central Europe under his rule, put it under the a new banner, which later on called the Holy Roman Empire.
If you mean ethnicity wise, African Americans (men only) received the right to vote in 1870. If you mean when did women get to vote, it was in 1920, August 26.