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25 Cards in this Set

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HEART
hollow organ with thick muscular tissues that propels the blood to different parts of the body by rhythmically contracting
PERICARDIUM LAYERS
Fibrous Pericardium
Serous Pericardium - Inner mesothelial layer which in turn has two layers
SEROUS PERICARDIAL LAYERS
Parietal Layer - lines the external wall of the pericardial sac
Visceral Layer - direct covering of the heart (epicardium)
LAYERS OF THE HEART:
EPICARDIUM
outermost covered by mesothelial cells, immediately below mesothelium are blood vessels, elastic fibers, nerves and adipose tissue
LAYERS OF THE HEART:
MYOCARDIUM
Middle layer, thickest and contains cardiac muscles arrangen in a complex spiral manner
LAYERS OF THE HEART:
ENDOCARDIUM (3 layers)
innermost layer exposed to the blood and participates in the formation of heart valves (determines direction of blood flow)
3 LAYERS OF ENDOCARDIUM:
SUBENDOCARDIAL LAYER
biggest part, loose connective tissue (areolar) that connects the myocardium and the endocardium.
contains blood vessels, nerves, Purkinje fibers
3 LAYERS OF THE ENDOCARDIUM:
SUBENDOTHELIAL LAYER ( Lamina Propria)
thin layer of connective tissue containing fibroblast, collagen and elastic fibers
3 LAYERS OF ENDOCARDIUM:
ENDOTHELIUM ( Epithelium)
simple squamous epithelium
CARDIAC SKELETON
Central support of the heart. muscle fibers and heart valves connect
CARDIAC SKELETON PARTS:
ANNULAR FIBROSA
dense fibrous rings of the AV node and Atrial foramina
CARDIAC SKELETON PARTS:
TRIGONA FIBROSA
triangular area between AV opening, islands of cartilage like tissue or chondroid tissue
CARDIAC SKELETON PARTS:
SEPTUM MEMBRANACEUM
regualar orientation of collagen bundles in layers superior to interventricular septum, connects muscle septum to trigona fibrosa
CARDIAC VALVES
reduplication of endocardium (2 layers), leaflets that control bloodflow by covering openings of the AV, Aortic and Pulmonary valves
supported by dense fibroelastic tissue and chondroid tissue
IMPULSE CONDUCTION SYSTEM
specialized cardiac system that is responsible for the generation of the heart beat and the conduction of the impulse to the different parts of the myocardium, and ensure that the atria and the ventricles contract in succession
INTERCALATED DISCS', DESMOSOMES' AND GAP JUNCTIONS' ROLES IN CONTRACTION
intercalated discs consists of desmosomes and gap junctions.
desmosomes are responsible for keeping your cardiac cells together during contraction
gap junctions (protein lined tunnels) are responsible for the direct transmission of depolarizing current from cell to cell
IMPULSE CONDUCTION SYSTEM CONSISTS OF...
SA node, AV node, Bundle of his/Atrio-ventricular bundle/Truncus-Atriosos-Ventriculosos, right and left bundle, Purkinje fibers
LOCATION OF THE IMPULSE CONDUCTION SYSTEM PARTS
SA node - below your epicardium, right atrial wall , near superior vena cava
AV node - beneath the endocardium, floor of the right atrium
Bundle of His/ Atrio-Ventricular Bundle/ Truncus-Atriosos-Ventriculosos - short bundles that originate from your AV node separating into....
right and left bundle that will further branch and anastomose...
Purkinje fibers
What is a Purkinje fiber?
specialized cardiac muscle
BLOOD VESSELS
hollow organs
ENUMERATE THE LAYERS OF THE ARTERY
Tunica Intima
-epicardium
-subendothelial layer
-internal elastic layer
Tunica Media - thickest
External Elastic Layer
Tunica Adventitia - with vasa vasorum
VASA VASORUM
blood vessel that supply nutrient to artery
VASA NERVORUM
Blood vessel that supply nutrient to nerve
NERVI VASORUM
nerve that supply nutrient to artery
NERVI NERVORUM
nerve that supply nutrient to vasa nervorum