A+P: The heart
🇬🇧
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| 🇬🇧 | 🇬🇧 |
| Superior | Base of heart |
| Inferior | Apex of heart |
| Outer protective layer attaching to mediastinum and diaphragm | Fibrous Pericardium |
| Inner layer of pericardium consisting of 2 layers. | Serous Pericardium |
| Outer layer of serous pericardium | Parietal layer |
| Inner layer of serous pericardium. | Visceral layer |
| 95% of heart wall | Myocardium |
| Smooth lining also covers valves | Endocardium |
| Receiving chambers | Atria |
| Pumping chambers | Ventricles |
| Affect auricles | Pectinate muscles |
| Between the 2 atria | Inter-atrial septum |
| Raised muscle fibers, part of conduction system (helps guide blood through chamber) | Trabeculae Carnae |
| Divides 2 ventricles | Interventricular septum |