Flashcards in Chapter 20- Heart and Neck Vessels Deck (111)
Area in anterior chest overlying heart and great vessels
How many chambers does the heart have?
2 ventricles, 2 atria
Major arteries and veins connected to the heart
Blood vessels arranged in 2 continuous loops:
Pulmonary circulation and systemic circulation
3 layers of the heart wall:
Pericardium: tough, fibrous, double-walled sac that surrounds and protects heart
Myocardium: muscular wall of heart; does the pumping
Endocardium: thin layer of endothelial tissue that lines inner surface of heart chambers and valves
Heart has how many pump systems?
Thin-walled reservoir for holding blood.
Thick-walled, muscular pumping chamber
unidirectional. and they open/close passively in response to pressure gradients in moving blood.
4 valves in heart:
2 atrioventricular (AV) valves
2 semilunar (SL) valves
What are the names of the 2 AV valves that seperate the atria and ventricles:
Triscupid valve: right AV valve
Bicuspid or mitral valve: left AV valve
AV valves open during ____.
diastole. during the hearts filling phase to allow ventricles to fill with blood.
AV valves close during ___.
Systole (pumping phase) to prevent regurgitation of blood back up into atria.
SL valves have __ cusps that look like half moons.
SL valve in right side of heart
SL valve in left side of heart
__ valves are present between vena cava and right atrium, or between pulmonary veins and left atrium.
Abnormally high pressure in ___ side of heart gives a patient symptoms of pulmonary congestion.
Abnormally high pressure in ___ side of heart shows in neck veins and abdomen.
___ blood drains into vena cava, following route of venous blood.
Blood goes from liver to ___ through inferior vena cava.
From RV, venous blood flows through ___ to pulmonary artery.
__ oxygenate blood.
From LA, arterial blood travels through __ valve to the __.
LV delivers blood to the ___.
Aorta delivers ___ blood to body.
__ is continuous loop; moving by continuous shifting pressure gradients.
ventricles relax and fill with blood; 2/3 of cardiac cycle
protodiastolic filling is the ___, where blood puts rapidly into the ventricles.
first/early passive phase