The most important thing about the Pixel, for Google and Android and probably you as well, is that this is the first phone to have the Google Assistant built in. Google Now is dead, long live the Google Assistant. Itâs a core piece of the phone, available everywhere just the way Siri is on the iPhone.
1 Understanding the role of each of the four heart valves can help you learn why you might need to be on the look out for certain signs and symptoms. 2  Additional valve terms and related conditions can help you broaden your understanding, too.
How the heart valves work. 1  The mitral valve and tricuspid valve, which control blood flow from the atria to the ventricles. 2  The aortic valve and pulmonary valve, which control blood flow out of the ventricles.