The leftauricle receives the arterial blood from the pulmonary veins.
2
The valves that control the opening from the leftauricle to the left ventricle.
3
The mitral valve guards the opening to the left ventricle from the leftauricle.
4
Trace the blood from the right ventricle to the alveoli and back again to the leftauricle.
5
The left ventricle being sufficient, there is no damming back through the leftauricle to the lungs.
6
From this point arterial blood returns to the leftauricle of the heart, while the venous blood gathers in the right auricle.
7
With the mitral valve insufficient, a greater or less amount of blood is regurgitated into the leftauricle, which soon becomes dilated.
8
A, the right ventricle; B, the left ventricle; C, the right auricle D, the leftauricle; E, the aorta; F, the pulmonary artery.
9
The leftauricle finds it difficult to empty all of its blood into the left ventricle during the ordinary diastole of the heart.
10
The blood flowing from the pulmonary veins into the leftauricle finds this cavity already partly filled with blood regurgitated from the left ventricle.
11
This increased muscular action of the right ventricle relieves the pulmonary congestion, and an increased amount of blood is forced into the leftauricle.
12
Granularity of the atrial cardiomyocytes in the leftauricles during alimentary dehydration of the organism does not change.