SEM, TEM, and IHC Analysis of the Sinus Node and Its Implications for the Cardiac Conduction System

<table>SN architecture. Elastic fibers geometrically arranged to form contiguous compartments; these fibers suggest a structure with orthogonally oriented walls (histochemistry: orcein HCl, ×800).</table>

Anatomy Research International

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Figure 1

Figure 1: SEM, TEM, and IHC Analysis of the Sinus Node and Its Implications for the Cardiac Conduction System 