Parts of the Heart

Superior Vena Cava

Aortic Arch

Ascending Aorta

Aorta

pulmonary trunk

Pericardium

Apex of heart

Fat in epicardium

Where is the Heart?

mediastinum

Pulmonary and Systemic

2 divisions of the heart

Inferior vena cava

descending aorta

right pulmonary veins

left pulmonary veins

branches of right pulmonary artery

anterior interventricular sulcus

auricle of left atrium

auricle of right atrium

brachiocephalic trunk

left common carotid artery

left subclavian artery

right atrium

left atrium

left ventricle

right ventricle

Pericardial sac

covering of heart

what is the perdicardium?

fibrous pericardium and serous pericardium

2 layers of pericardium (outer to inner)

parietal and visceral pericardium

2 layers of serous pericardium

epicardium, myocardium, endocardium

what is the heart wall made of?

trabeculae carneae

interventricular septum

tricuspid valve

mitral (bicuspid) valve

chordae tendineae

papillary muscles

chordae tendinae of mitral valve

AV (Atrioventricular) Valves

tricuspid and mitral

SL (Semilunar) valves

pulmonary and aortic

pulmonary valve

aortic valve

left coronary artery

circumflex branch

posterior interventricular branch

anterior cardiac veins

coronary sinus

small cardiac vein

sinoatrial (SA) node

atrioventricular (AV) node

bundle of His

purkinje fibers

Steps of the conduction of the heart

1) SA node fires

2) excitation spreads through the atrial myocardium

3) the AV node fires

4) excitation spreads through down the bundle of His

5) purkinje fibers distribute excitation through the ventricular myocardium