The Rise of Kâ12 Blended Learning | 133 NSTITUTE NNOSIGHT represents a ranking of 1 st in Santa Clara County and 5 th in California when compared to similar schools with at least 70 percent low-income students.
The heart has four chambers, two upper atria, the receiving chambers, and two lower ventricles, the discharging chambers. The atria open into the ventricles via the atrioventricular valves, present in the atrioventricular septum. This distinction is visible also on the surface of the heart as the coronary sulcus.
A normal heart has four chambers. The upper two chambers are the right and left atria. The lower two chambers are the right and left ventricles. Blood is pumped through the four heart chambers with the help of four heart valvesâthe tricuspid, pulmonary, mitral and aortic valves. The heartâs job is to supply the body with oxygen-rich blood.