Heart Anatomy Flashcards
where is the heart located
in the mediastinum in the thoracic cavity
what is the area between the lungs called
mediastinum
how much of the heart lies to the left
2/3
wider top of the heart
base
base attached to
great vessels
heart’s inferior end
apex
qualities of apex
tilts to the left
relatively pointed
adult heart size
clenched fist
which side of heart receives deoxygenated blood from the body
right
right side of heart receives
and pumps it through
deoxygenated blood from the body
pulmonary circuit
oxygenated blood from lungs goes to ____ side of heart
left
where does left side of heart send oxygenated blood
systemic circuit
into rest of body
heart wall layers of tissues
epicardium
myocardium
endocardium
pericardium
double-walled sac surrounding heart
pericardium attached to
diaphragm below and walls of great vessels above
epicardium
myocardium
endocardium
three layers of heart wall tissue
epicardium
thin outer membrane with fat deposits that fill the grooves in the heart surface and protect coronary vessels
myocardium
thick, middle layer of heart wall composed of caridac muscle tissue
endocardium
inner heart wall layer consisting of simple squamous endothelium in a membrane called endothelium
outer heart wall layer
epicardium
middle heart wall layer
myocardium
inner heart wall layer
endocardium
how many chambers in heart
4
chambers seperate what
oxygenated blood from deoxygenated blood
atria
two top chambers in heart
singular- atrium
ventricles
two bottom chambers in heart
blood vessels that return blood to the heart
veins
vessels that carry blood away from heart
arteries
which atrium receives venous blood from systemic and coronary circuits
right
flap-like extensions with cavities continuous with the atria
auricles
wall between atria
interatrial septum
returns venous blood from head and neck region
superior vena cava
returns venous blood from body below neck
inferior vena cava
opening that collects venous blood from the coronary circulation
coronary sinus
collects deoxygenated blood from right atrium
right ventricle
sends deoxygenated blood through pulmonary trunk and arteries to lungs
right ventricle
forms most of the base of the heart
left atrium
four _____ return oxygenated blood from pulmonary circuit to left atrium
pulmonary veins
forms apex of heart
left ventricle
receives blood from left atrium
left ventricle
pumps blood through aorta
left ventricle
wall between ventricles
interventricular septum
thin flaps of tissue that prevent backflow in heart
valves
regulate blood flow from atria to ventricles
atrioventricular (AV) valves
atrioventricular valve on right side, three flaps
tricuspid AV valve
atrioventricular valve on left side, two flaps
bicuspid/mitral AV valve
connects valves to papillary muscles on floor of ventricles
chordae tendineae
chordae tendineae connects valves to
papillary muscles on floor of ventricles
papillary muscles contract on chordae tendineae and…
prevent backflow of blood into the atria when ventricles contract
regulate flow of blood from ventricles into aorta and pulmonary trunk
semilunar valves
valve that controls flow from right ventricle into pulmonary trunk
pulmonary semilunar
valve that controls blood flow from left ventricle into aorta
aortic semilunar
coronary circulation system
supply of arteries and capillaries that deliver blood to every cell in myocardium cardiac muscle
system of arteries and capillaries that deliver blood to every cell in cardiac muscle of myocardium
coronary circulation system
