The heart is actually a four-chambered hollow organ. It can be divided into the correct and still left sides by a muscular wall called a septum. The right and left sides are further more divided into two upper chambers named atria (or atriums) and two reduce chambers identified as ventricles. https://sousvideprecisioncooker63837.blog-kids.com/37147587/the-5-second-trick-for-4200-loan