Following is a list of structures through which a red blood cell...

The pathway of a red blood cell from the right atrium to the systemic aorta is as follows:

Right atrium $\rightarrow$ Tricuspid valve (C) $\rightarrow$ Right ventricle $\rightarrow$ Pulmonary semilunar valve (D) $\rightarrow$ Pulmonary artery $\rightarrow$ Lungs $\rightarrow$ Pulmonary vein (E) $\rightarrow$ Left atrium $\rightarrow$ Bicuspid valve (A) $\rightarrow$ Left ventricle $\rightarrow$ Aortic semilunar valve (B) $\rightarrow$ Systemic aorta.

The correct sequence is C-D-E-A-B.

Answer: C-D-E-A-B