Histology Of Heart

Front 1

endothelial cells, basal lamina, subendothelial layer

Back 1

endocardium

Front 2

area b/t endocardium and regular cardiac muscle

Back 2

subendocardium

Front 3

contains veins, nerves, and Purkinje

Back 3

subendocardium

Front 4

cardiac muscle cells

Back 4

myocardium

Front 5

mesothelium

Back 5

epicardium

Front 6

fibroelastic ct, nerves, coronary arteries, cardiac veins, fat

Back 6

epicardium

Front 7

fat is most abundant in

Back 7

AV groove

Front 8

cardiac fibers are branched and joined together at

Back 8

intercalated disks

Front 9

which are smaller? atrial or ventricular myocytes

Back 9

atrial

Front 10

T-tubules are larger and meet at site of

Back 10

Z line, not AV jct

Front 11

cardiac muscle contracts spontaneously from

Back 11

leakage of Ca into sarcoplasm from ER and extracellular enviro

Front 12

intercalated discs have lateral and transverse portions, other properties include

Back 12

1. transverse has fascia adherans, desmosomes, and some gap jct's
2. lateral has many gap jct's

Front 13

SA node location

Back 13

R atrium, near entrance of SVC

Front 14

AV node

Back 14

wall of R atrium above opening for coronary sinus

Front 15

carries impulse from AV node to ventricles b/t atria and ventricles

Back 15

Bundle of His

Front 16

Purkinje location

Back 16

subendocardium

Front 17

Purkinje cells (describe)

Back 17

fewer myofibrils, more glycogen than cardiac cells, many gap jct's, no T tubules

Front 18

skeleton of heart consist of

Back 18

4 rings - annulus fibrosis, 2 trigons R and L, membraneous septum

Front 19

orientation of intima

Back 19

longitudinal

Front 20

orientation of media

Back 20

circular

Front 21

orientation of adventia

Back 21

longitudinal

Front 22

in vein ____ forms valves

Back 22

intima

Front 23

internal elastic mem

Back 23

intima

Front 24

Weibel-Palade bodies

Back 24

endothelial cells of arterioles, contain von WF

Front 25

media

Back 25

some elastic fibers, external elastic mem

Front 26

adventia

Back 26

fibroelastic ct, nerve fibers, vasa vasorum, lymph vessels, in some blood vessels, longitudinal sm muscle

Front 27

elastic arteries

Back 27

media = fenestrated elastic laminae b/t which are sm muscle and elastic fibers, have vasa vasorum

Front 28

muscular arteries

Back 28

intima has distinct internal elastic mem, media = thick layer of circular sm muscle, distinct external elastic mem, adventia - vasa vasorum,

Front 29

arterioles regulate

Back 29

BP

Front 30

arterioles - media

Back 30

media = 1-2 layers sm muscle,

Front 31

metarterioles

Back 31

end in precapillary sphincters, give rise to capillaries

Front 32

continuous capillaries structure

Back 32

no fenestra in cytoplasm, complete basal lamina

Front 33

continuous capillaries are found in

Back 33

CNS, muscle, ct, lungs, exocrine glands

Front 34

fenestrated capillaries structure

Back 34

small "windows" in cyto of endothelial cells covered by diaphragm,

Front 35

fenestrated capillaries are found in

Back 35

endocrine glands, intestine, pancreas, renal glomeruli (no diaphragm), pars distalis of hypophyses

Front 36

sinusoidal capillaries - structures

Back 36

large fenestra in cyto of endothelium, incomplete basal lamina, gaps b/t cells,

Front 37

sinusoidal capillaries are found

Back 37

liver, spleen, bone marrow, lymph nodes, adrenal cortex

Front 38

post-capillary venules - descript

Back 38

pericytes in media, endothelium has few if any tight jct's, where white cells leave (diapedesis) and re-enter circulation

Front 39

collecting venules

Back 39

larger diameter

Front 40

muscular venules

Back 40

larger w/ media of sm muscle

Front 41

small and medium veins

Back 41

adventia thick - in relation to media

Front 42

large veins above heart (SVC, jugular)

Back 42

intima and media thin, adventia of thick ct

Front 43

abdominal vein (IVC, portal)

Back 43

adventia contain many longitudinal sm muscle fibers

Front 44

Purkinje fibers are ___ than myocardial cells

Back 44

larger

Front 45

Purkinje cells contain

Back 45

more glycogen and mitochondria

Front 46

Purkinje cells have ____ myofibrils than cardiac cells

Back 46

fewer

Front 47

at the end of the conduction pathway, purkinje cells become

Back 47

regular cardiac myocytes

Front 48

purkinje contain (connections)

Back 48

gap jct's, fascia adherens, desmosomes w/ cardiac cells,

Front 49

what feature is not present on Purkinje?

Back 49

T-tubules

Front 50

4 rings - annulus fibrosis support

Back 50

tricuspid, mitral, aortic, pulm valves

Front 51

2 trigones connect

Back 51

annulus fibrosis of aortic valve to rings of bicuspid valve and the membranous septum