Lab 6 - Heart Flashcards
mediastinum
- in the thoracic cavity; not symmetrical
- need pic
pericardial sac
- sac that encloses the heart
- need pic
fibrous pericardium
- tough connective tissue
- need pic
parietal layer of serous pericardium
- outer layer of the sac
- need pic
visceral layer of the pericardium
- inner layer of the sac
- need pic
Right auricle
Left auricle
Coronary sulcus
Anterior interventricular sulcus
Posterior interventricular sulcus
Apex
Base
Superior vena cava
Right atrium
Tricuspid valve
Right ventricle
What is the valve between the right ventricle and the
pulmonary trunk?
Pulmonary semilunar valve
Pulmonary trunk
Left pulmonary vv.
Left atrium
Bicuspid valve
Left ventricle
What is the valve between the left ventricle and the
ascending aorta?
Aortic semilunar valve
Ascending aorta
Interventricular septum
Interatrial septum
Chordae tendinae
What do the chordae tendinae attach
to on the inside of the ventricular wall?
papillary muscle
What do cells that have pacemaking potential do?
They depolarize by themselves.
P wave – Atrial depolarization
QRS complex – Ventricular depolarization
T wave – Ventricular repolarization
inferior vena cava
Pulmonary artery
aortic arch
epicardium
- outermost layer of the heart
myocardium
- middle layer of the heart (cardiac muscle)
endocardium
- innermost layer of the heart
intercalated discs
- connect cardiac muscle cells
- propagate action potentials
Left coronary a.
Circumflex a.
Anterior interventricular a.
Right coronary a.
Posterior interventricular a.
Marginal a.
Great cardiac vein
middle cardiac vein
small cardiac vein
coronary sinus
SA node
In the posterior wall of the right atrium
Near opening of vena cava
This is the hearts natural pacemaker
AV node
Located in the floor of the right atrium
Receive impulses from the internodal pathways
AV bundle
From the AV node, impulses enter the ventricles through the AV bundle
Left and right bundle branches
Purkinje fibers
Deliver impulses to cardiac muscle cells in the ventricles
Lead to ventricle contraction
