Understanding the Heart Muscles: Atria, Ventricles & Key Structures
Atria:- Receiving chambers.
- Thin walls.
- Auricles: ear-shaped appendages.
Ventricles:
- Pumping chambers.
- Thick walls.
- Papillary muscles: projections from ventricular wall.
- Chordae tendineae: white, fibrous cords.
- Trabeculae carneae: ridges of the myocardium.
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