The Sino-Atrial (SA) node consists of specialized cardiac fibers with few myofibrils and limited nerve innervation.
The Sino-Atrial (SA) node is composed of specialized cardiac fibers with few myofibrils and minimal nerve endings.
| Front | Types of Photosystems |
|---|---|
| Back | PS-I: P700 (later) PS-II: P680 (earlier) |
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