The Heart
The Blood Pump
The Circuits
Pulmonary
Systemic
Coronary
Traveling with blood.
Arriving at the Heart
The Systemic Circuit
Now arriving at the Right Atrium
Travel to the right atrium by way of Superior Vena Cava, Inferior Vena Cava and Coronary Sinus
Landmarks of note?
Fossa ovalis: once foramen ovale
Pectinate Muscles
Auricle
Interatrial septum
Atrioventricular Valve: Tricuspid valve
Next stop Right Ventricle
Right Ventricle
Arrival through the tricuspid valves
Chordae tendineae
Papillary muscles
Landmarks of note
Trabeculae carnae
Conus arteriosus
Interventricular septum
Pulmonary semilunar valves
Next stop Pulmonary Trunk
Travel to the Lungs & Back
The Pulmonary Circuit
Pulmonary trunk
Right & Left pulmonary Arteries
Lungs (arterioles, capillaries, venules)
Right and Left Pulmonary Veins
Arrival back at the heart: the Left Atrium
Back in the Heart Left Atrium
What’s different from Right Atrium?
Blood has more oxygen
No Coronary sinus
Bicuspid Valve or Mitral valve
Next stop the Left Ventricle
Last Room in the Heart
The Left Ventricle
What’s different?
Muscle wall is thicker
Aortic Semilunar valve
Next stop Aorta and the Systemic circuit
The Aorta
Ascending, Arch Descending, Thoracic, Abdominal…
Branches of
Right and Left Coronary arteries
Brachiocephalic
Left Common Carotid
Left Subclavian
Ligamentum arteriosum: and old branch
Surface of the Heart
Base and Apex
Sternocostal surface
Diaphragm surface
Left & Right
Vertebral
Surface of the Heart
Coronary Sulcus
Coronary sinus
Great Cardiac vein
Small cardiac vein
Circumflex artery
Interventricular sulci
Anterior
Anterior interventricular branch of left coronary artery
Great Cardiac Vein: Starts here
Posterior
Middle Cardiac vein
Putting the Heart Together in Layers
Pericardium – a sac for the heart
Dense fibrous
Areolar
Mesothelium
Pericaridal cavity
Epicardium
Myocardium
Endocardium
Endothelial
Areolar
Heart Muscle
Intercalate discs
Gap Junctions
No Triads: T- tubules too short
Built for endurance, which means…
The Cardiac Cycle
Systole
Diastole
Electrocardiograms
P wave
QRS complex
T wave
Sinoatrial node: nodal cells
Atrioventricular node
Interventricular bundles
Purkinje fibers
The Fibrous Skeleton of the heart