The human heart has four chambers - two auricles (or atria) and two ............ what?
Heart although this description is disputed, as the heart is likely to be slightly larger. Well-trained athletes can have much larger hearts due to the effects of exercise on the heart muscle, similar to the response of skeletal muscle. 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. There is an ear-shaped structure in the upper right atrium called the right atrial
Blue baby syndrome Blue baby syndrome Blue baby syndrome refers to at least two situations that lead to cyanosis in infants: congenital cyanotic heart diseases, and nitrate contaminants from drinking water leading to methemoglobinemia. A number of cardiovascular defects may lead to Blue baby syndrome. The most common cyanotic heart defects include the following: The most common cause of blue baby syndrome, and the one which was the subject of the classic "blue baby operation" developed at Johns Hopkins in the 1940s, is tetralogy of Fallot. In the normal heart, there are four separate chambers; the two top chambers, or atria, pump blood