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.
The four main valves in the heart are: 1  The two atrioventricular (AV) valves, the mitral valve (bicuspid valve), and the tricuspid valve, which are between the upper atria and the lower ventricles. heart valve normally allows blood to flow in only one direction through the heart. The four valves commonly represented in a mammalian heart determine the pathway of blood flow through the heart. A heart valve opens or closes incumbent on differential blood pressure on each side.