CVS Flashcards
Layers of blood vessels?
Tunica externa
Tunica media
Tunica Intima
Which is the thickets layer of blood vessel?
Tunica media
Which is the thinnest blood vessel?
Capillaries
Which layer of blood vessels change diameter ?
Tunica media
What is the primary function of capillaries ?
Exchange of materials between blood vessels and tissues
Which blood vessel has thinner walls?
Arteries or veins?
Veins.
70% of blood is found in which vessels?
Veins
Where is heart located?
Middle medistinum in the thoracic cavity
Double layer covering of heart is?
Pericardium
Parietal pericardium
Visceral pericardium
What is the main function of pericardium and pericardial fluid ?
Protects heart from shocks and injuries and allows free movement
What are the chamber so the heart?
RA
RV
LA
LV
What are the valves of the heart?
Bicuspid / mitral valve
Tricuspid valve
2 Atrioventricular
Pulmonary valve
Aortic valve
Where is the pulmonary valve ?
RV and pulmonary artery
Where is the aortic valve?
Between LV and aorta
What are the three layers of the heart?
Epicardium
Myocardium
Endocardium
Which chambers are thickest?
Ventricles to push out blood
What divides the chambers of the heart?
Septum’s
Interatrial septum
Inter ventricular septum
Where is the tricuspid valve ?
Between RA
RV
Where is the mitral valve?
Between LA LV
What is the function of valves ?
To ensure unidirectional flow of blood
Which artery is the only artery that carry deoxygenated blood?
Pulmonary artery
Which vein is the only vein that carries oxygenated blood.
Pulmonary vein
Which is the largest artery ?
Aorta
Why is blood flow in human called double circulation?
Blood passes twice through the heart to complete one round
What is pulmonary circulation?
Part of circulation taking place in the lungs
What is systemic circulation?
Part of circulation taking place in the body
What is systole?
Chamber Contraction - blood pumping
What is diastole ?
Chamber relaxation - blood filling
1 heart beat - 1 cardiac cycle.
What are the phases?
Atrial systole > ventricular systole
Atrial diastole > ventricular diastole
Abnormal heart sound is called?
Murmur
Heart sound lub indicates what?
Closure of tricuspid and bicuspid valve
Beginning of systole