Heart, Anatomy

Model Of The Intern Anatomy Of The Heart Of An Adult Human Body Anterior View Of A Frontal Section. The Heart Contains Four Cavities: Two Atriums In Its Upper Part, And Two Ventricles In Its Lower Part. Both Ventricles Are Separated By A Thick Muscle Wall, The Interventricular Septum. The Superior Vena Cava In Royal Blue, In The Background Brings The Deoxygenated Blood To The Right Atrium. This Dark Blood Goes Through The Right Ventricle And Is Then Propeled To The Lungs Via The Pulmonary Trunk, Dividing In Right And Left Pulmonary Arteries In Royal Blue, In The Foreground. The Oxygenated Blood Is Next Sent Back From The Lungs To The Heart Left Atrium, Externally Covered By The Auricles, In Beige Through The Left Pulmonary Veins In Red. The Heart Expels Then The Blood To The Whole Body Via The Arch Of Aorta In Red, Which Branches Into The Brachiocephalic Trunk, The Left Common Carotid Artery And The Left Subclavian Artery. The Tricuspid On The Right And Mitral On The Left Valves In White Prevent The Blood In The Ventricles From Flowing Back Into The Atriums. These Valves Are Bound To The Papillary Muscles, Protusions Lying At Each Ventricle Basis, Through Tendinous Ropes: The Chordae Tendinae. The Pulmonary Valve In White, Located Inside The Pulmonary Trunk, Allows The Ejection Of The Dark Blood Out Of The Heart. The Upper Trachea Cartilaginous Rings In Light Blue And Esophagus In Reddish Brown Segments Are Visible Behind The Heart. (Photo By BSIP/UIG Via Getty Images)