four chambers in the heart
right atrium, right ventricle (anterior side) left atrium, left ventricle (posterior side)
atrium
blood enters heart
ventricle
blood exits heart
superior vena cava
draining blood from head and upper limbs
inferior vena cava
draining blood from lower limbs
right atrium
deoxygenated blood enters from superior and inferior vena cava
right ventricle
forceful pumping of deoxygenated blood to the lungs
pulmonary trunk
conducts deoxygenated blood from the heart to the lungs
right and left pulmonary arteries
direct deoxygenated blood to the corresponding lung
pulmonary veins
carries oxygenated blood from the lungs to the left atrium of the heart
left atrium
holding chamber for blood returning from the lungs and to act as a pump to transport blood to other areas of the heart
left ventricle
receives oxygenated blood from the left atrium and pumps it out under high pressure through the aorta to the body
aorta
pump oxygenated blood out to the body
off of aorta
brachiocephalic trunk, left common carotid artery, left subclavian artery
brachiocephalic trunk
supplies blood to right arm and trunk (1)
left common cartoid artery
supplies blood to head and neck
left subclavian artery
supplies blood to left arm
blood through right side of heart
(deoxygenated blood) superior and inferior vena cava> right atrium> tricuspid (AV) valve> right ventricle> pulmonary semilunar> pulmonary trunk> pulmonary arteries (1 for each lung)
blood through left side of heart
(oxygenated blood) lungs> pulmonary vein> left atrium> mitral (AV) valve> left ventricle> aortic semilunar valve> aorta> all of body
Right and left sides of hearts responsibilities
right: receiving blood and sending to lungs; left: taking in oxygenated blood and getting it to the rest of the body
in right atrium
pectinate muscles, fossa ovale, right atrioventricular valve
in right ventricle
right atrioventricular valve, papillary muscles, chordae tendinae, pulmonary semilunar valve
pectinate muscles
ridged, lining walls; as bag fills wall will stretch and smooth out, found in right atrium
fossa ovale
was a hole until your 1st breath; scar left from this closing; found in right atrium
right atrioventricular valve
(tricuspid) allow blood to go from right atrium to right ventricle opens when atrial pressure rises, closes when ventricle pressure increases; found in right atrium
papillary muscles
prevent backwards flow of ventricular blood into atrial cavities; attached to the tricuspid valve by chordae tendinae; right ventricle
chordae tendinae
“heart strings”; connect papillary muscles to the tricuspid and bicuspid valves in the heart; right ventricle
pulmonary semilunar valve
(3 crescent shaped cusps) lies btw right ventricle and pulmonary artery; opens when pressure in right ventricle rises a live pressure in pulmonary artery, when pressure falls it closes; right ventricle
left atrioventricular valve
“mitral” same as right
papillary muscles
in left ventricle (same as right)
chordae tendinae
in left ventricle (same as right); when left ventricle contracts blood goes out aorta
aortic semilunar valve
between the left ventricle and aorta; 3 crescent shaped cusps (pressure rises ventricle opens, pressure lowers in ventricle closes)