Illustration of the left and right upper chambers, or atria, of the heart. The heart is a hollow sac of muscular tissue that pumps blood around the body. The two round structures at lower centre are valves, which prevent the back flow of blood from the lower chambers, the ventricles, to the atria. Illustration from Traite d' Anatomie humaine By L. Testut (1905) Paris. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Collection Abecasis |
Bildgröße: | 3307 px × 2933 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |