Chapter 20- The Heart

25 cards

Chapter 20- The Heart


 
  
Created Feb 8, 2012
by
tasharoland14

 

 
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1
Layers of the Heart
 
1. Pericardium- very outside layer, anchors heart and gives strength      ...
2
Sulci
 
grooves in the heart containing coronary blood vessels and fat
3
Pathway of blood
 
Right Atrium- deoxygenated blood enters hereRight Ventricle- heart contracts and moves blood...
4
Where is the bicuspid and tricuspid valves located?
 
Bicuspid- Left AtriumTricuspid- Right Atrium 
5
Which ventricular wall is thicker and why?
 
Left because it pumped blood out to the entire body so needs to have more pressure behind the...
6
What happens if right ventricle fails?
 
Blood will pool into tissues
7
What happens if left ventricle fails?
 
Blood will get backed up in the lungs
8
A-V valve
 
Open during atrial contraction Right- Tricuspid valveLeft- Bicuspid (mitral) valve
9
SL Valves 
 
Open during ventricular contraction Right- in pulmonary trunkLeft- in aorta 
10
Coronary Arteries 
 
Branches off aorta about SL valve
11
Left Coronary Artery 
 
a) Circumflex Branch- supplies atrium and ventricles b) Anterior Interventricular Artery-...
12
Right Coronary Artery 
 
a) Marginal Branch- supplies right ventricleb) Posterior Interventricular Artery- supplies...
13
Coronary Veins
 
collects waste from cardiac muscle and drains into coronary sinus which empties into right...
14
Autorhythmic Cells
 
cells fire spontaneously, act as pace maker
15
SA Nodes
 
In right atriumfastest acting 90-100 so set paceexcite the AV nodes

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