Caption: Types of reptilian hearts: lizard, snake, crocodile, and turtle
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 40.50 MB

Caption: Ventricular assist device, an artificial heart that helps pump oxygenated blood through the aorta and to the body's tissues.
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 17.57 MB

Caption: Human heart showing chambers and ventricles
Artist: McClatchy - Tribune
Release: Not Applicable
File Size: 1.50 MB

Caption: Medial view of the left hemisphere of the human brain
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 15.69 MB

Caption: The human pineal gland.
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 13.61 MB

Caption: Comparison of a normal heart to one with a ventricular septal defect
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 56.06 MB

Caption: Pulmonary veins and arteries
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 10.40 MB

Caption: Diagram demonstrating the difference between a normal heart and a heart with an atrial septal defect
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 56.06 MB

Caption: Heart strapped into seat of car
Artist: Nikolai Punin
Release: Not Applicable
File Size: 51.45 MB

Caption: Diagram of an artificial pacemaker
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 60.87 MB

Caption: Anatomical sources of neural and hematopoietic stem cells.
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 15.20 MB

Caption: Cross section comparing the left ventricular wall of normal heart to a left ventricular wall that has experienced hypertrophy.
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 56.06 MB

Caption: Anatomical heart with clocks
Artist: Jane Sterrett
Release: Not Applicable
File Size: 50.25 MB

Caption: Diagram showing the exterior and a cross-section of the human heart
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 11.44 MB

Caption: Electrical conduction in the heart in healthy individuals is controlled by pacemaker cells in the sinoatrial node.
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 38.43 MB

Caption: Electrocardiogram of the alternating contractions during one heartbeat and a diagram of the heart's impulse-conducting system.
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 24.12 MB