MODULE 3 : CVS Flashcards
Transverse lines at the ends of the branching gibers
INTERCALATED DISCS
Thickest and most prominent layer with strands of C.T. and vascular network in between cells
MYOCARDIUM
Characteristic of Cardiac Muscle Tissue
- striated, involuntary
- cylindrical / elongated, w/ branching ends
- mono- / binucleated
Visceral layer of pericardium
EPICARDIUM
Most prominent anchoring sites
FASCIA ADHERENS / JUNCTIONS
Cardiac cells binding
DESMOSOMES / MACULA ADHERENS
For ionic continuity
GAP JUNCTIONS
Inter ventricular Septum; muscle attachments
SEPTUM MEMBRANACEUM
Found between arterial foramina and AV canals
TRIGONA FIBROSA
Site of principal attachment for the cardiac muscles and AV Valves
ANNULI FIBROSI
Functions as :
- Anchors and supports heart valves
- firm points of insertion for cardiac muscles
CARDIAC SKELETON
Pacemaker of the heart; sulcus terminalis area
SA NODE
Below posterior leaf of aortic valve
AV NODE
Trigonum Fibrosum Dextrus
Bundle of His
Anastomosing channels of small caliber vessels providing interchange of substances
CAPILLARIES
Separates T. Media from T. Adventitia in arteries
EXT. ELASTIC LAMINA
Vasodilator
Prostacyclin, NO2
Vasoconstrictor
ENDOTHELIN
3 layers of Large Arteries :
T. INTIMA :
A. ENDOTHELIUM : SS
B. SUBENDO : thin loose CT
T. MEDIA : thickest
T. ADVENTITIA : underdeveloped w/ vasa vasorum
Hardening of the arteries
ARTERIOSCLEROSIS
A condition in the arteries where in there are Fibrous deposits (atheroma) and thickening of T. Intima
ATHEROSCLEROSIS
A condition wherein there is dilation / weakening of the wall
ANEURYSM
Type of artery which functions as conducting / elastic arteries
LARGE ARTERIES
aorta / pulmonary arteries
Type of artery which functions as distributing / muscular arteries
MEDIUM SIZED ARTERIES
3 layers of Medium Sized Arteries
T. INTIMA : “prominent” internal elastic lamina
T. MEDIA : “external elastic lamina”
T. ADVENTITIA : LCT (vasa vasorum, nervi vasorum)
Regulates distribution of blood to the capillary beds. Maintains BP
SMALL ARTERIES & ARTERIOLES
Type of wall structure where there is lacking of pores seen in muscle, exocrine glands, lungs, skin, and nervous tissue
CONTINUOUS
A type of wall structure with pores seen in kidneys, intestine, choroid plexus, and endocrine glands
FENESTRATED
A type of wall structure with tortuous path and greatly enlarged diameter, absence of continuous basal lamina & linings found in liver and hematopoietic organs
SINUSOIDAL
3 layers of Veins
T. ADVENTITIA : Collagenous CT
T. MEDIA : sparse circular muscle loosely arranged
T. INTIMA : endothelial layer
Main site of WBC migration into and out of circulation
POST-CAPILLARY VENULES
Characterized by bundles of longitudinal smooth muscle; prominent valves. Examples are SVC and IVC
LARGE VEINS
A condition wherein there is occlusion and swelling of veins
THROMBOPHLEBITIS
Happens when there is wall weakness and valve defects in the vein
VARICOSITIES
thickest coat of arteries :
A. T. Media
B. T. Intima
C. T. Adventitia
TUNICA MEDIA
Vasa Vasorum of Veins extend to what layer?
A. T. Media
B. T. Intima
C. T. Adventitia
TUNICA INTIMA
