the flags color is yellow and green
Answer:
Illegal immigrants have killed 63,000 U.S. citizens
Explanation:
The killing of Americans by the Immigrants got into controversy as President Donald Trump make a statement. American President Trump declared in 2018 that 63,000 Americans citizens have killed by unauthorised immigrants since the World Trade Center attack on September 11, 2001. Several studies for years have shown that illegal immigration does lead to an increased crime rate which includes violence, murder, and drug problems.
Sinoatrial node part of the autonomic nervous system adjusts the heart rate and the arteriole diameter to regulate blood pressure through negative feedback
The SA (sinoatrial) node is generates an electrical signal that can causes the upper heart of the chambers (atria) to contract. The signal and then passes through the AV (atrioventricular) node to the lower of the heart chambers (ventricles), causing them to contract, or to pump. The SA node is considered the pacemaker of heart.
The sinus node continuously generates electrical impulses, thereby setting the normal rhythm and also rate in a healthy heart. Hence, the SA node is also referred to as the natural pacemaker of the heart
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