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Flashcards in Overview Deck (21)
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1

Automaticity

heart beats by itself

2

myogenic

originates within heart/muscle

3

Function of Sinoatrial node

specialized myocytes
initiates heartbeat

4

Atrioventircular node located? Fcn?

between atria/ventricles
Slows conduction - allow atrial contraction to precedes ventricular contractions

5

His-Purkinje system

bundle of his, L/R Bundle branches, Purkinje fibers (inner wall of ventricles)
Coordinated contraction of ventricles

6

R atrium * R ventricles supplied by

Right main coronary artery

7

LA/LV supplied by

Left coronary artery

8

LCA bifurcates to

Left anterior descending
Circumflex arteries

9

Coronary veins drains into:

coronary sinus (posterior of heart - drains into RA)

10

BV: inner layer, connective tissue/vascular endothelium, signaling

tunica intima

11

BV: Site of atherosclerotic plaque formation

tunica intima

12

BV: Outer most layer

tunica adventitia

13

BV: Connective tissue (collagen/elastin)

tunica adventitia

14

BV: Middle layer/ control vessel diameter

Tunica Media

15

Precapillary sphincter

smooth muscle bands at junction of arterioles and cap bed

16

Blood flow in cap bed controlled by:

Pressure gradients/precapillary sphincter

17

Lymph is _____ ______ fluids

filtered interstitial

18

Lymphatic capillaries differ:

porous blind end capillary

19

Lymphatic system is ___ pressure, ___ - way valves

low, one

20

Flow of lymph/Blood per day

2-4 vs 7000

21

General blood flow

aorta - large artery - small artery - arteriole - capillary - venule - vein - vena cava