Cardiovascular System Flashcards
External structure that lies between the ventricles of the heart is the posterior and anterior interventricular sulcus. True or False
True
Pulmonary circuit transport deoxygenated blood from the heart to the lungs
True or false
True
Systemic circuit transports deoxygenated blood from the heart to tissues.
True or false
True
Happens on ECG before atria contracts
P wave
What structure initiates atrial depolarization?
SA node
What causes the QRS complex?
Ventricular depolarization
Atrial depolarization
Stroke volume equation
EDV-ESV
What is it called when the resistance the left ventricle has to overcome to pump out blood?
Afterload
Ejection fraction
EDV-ESV/EDV
Where does blood enter in the right side of the heart?
Superior vena Cava, inferior vena cava, vena Cava
After the Vena cava blood goes to
Right atria
After the right atria blood goes to
Right ventricle
After the pulmonary arteries blood goes to
Pulmonary veins
Connections between cell membranes that allow ions to move between cells, thus transmitting signals
Gap junctions
What muscle prevents prolapse of av valve
Papillary muscle
Toward the heart carries deoxygenated blood
Vein
Carries oxygenated blood away from the heart
Arteries
Pulmonary arteries carry deoxygenated blood away from the heart and to the lungs. True or false
True
Pathway of a signal through the cardiac conduction system
SA node-av node- bundle of his- bundle branches- purkinje fibers
Systole is what
Contraction
Diastole is what
Relaxation
What causes the’ lub’ sound?
AV valve closing
What causes the ‘dub’ sound
Semilunar valve closes
The force of blood returning to the heart (venous return) or____ is influenced by ____
Preload; skeletal muscle contractions
