The Heart: CHP 7 Flashcards
How many pumps does the heart have?
2
What is the function of the right side of the heart?
Sending oxygen-poor blood to the lungs
What is the function of the left side of the heart?
Sending oxygen-rich blood to the rest of the body
What are the two types of heart valves?
Atrioventricular and semilunar
What is the location of the atrioventricular valve?
Separating atrium from ventricle
What is the location of the semilunar valve?
Separating ventricle from major artery
What are the two atrioventricular valves?
Tricuspid: right side
Bicuspid: left side
What are the two semilunar valves?
Pulmonic: right
Aortic: left
What is cardiac muscle tissue called?
myocardium
Describe the atrial wall.
Thin walled
Collects and pumps blood short distances
Describe the left ventricle wall.
Thicket wall so that it can pump blood throughout the entire body
Describe the right ventricle wall.
Middle thickness
Only pumps blood to the lungs
Describe the location of the heart.
Rests on diaphragm near thoracic cavity midline
Enclosed in mediastinum
Slightly left of body’s midline
The outer covering of the heart is called
Pericardium
What is cardio cerebral resuscitation?
Method of resuscitating with only chest compressions
What is myocarditis?
Heart inflammation
What is a coronary bypass?
Treatment for a blocked coronary artery
What is the purpose of the pulmonary circuit?
To oxygenate blood received from the tissues
Electrical excitation for heart contraction begins in…
SA Node
List the order through which electrical impulses pass through the cardiac conduction system.
SA Node
AV node
AV bundle (his)
Right and left bundle branches
Purkinje fibers
Where is the SA node located?
Right atrium
Where is the AV node located?
Lower right corner of the right atrium
Where is the bundle of his located?
In the septum
Where are the right and left bundle branches located?
Down the septum towards the ventricles
Where are the Purkinje fibers located?
On the walls of the right and left ventricles
What are the components of EKG?
P wave
PR interval
QRS complex
ST segment
T wave
Define ventricular repolarization.
Relaxation of the ventricles
Define ventricular depolarization.
Contraction of the ventricles