Topic 12 - Circulatory Route Flashcards
circulatory routes
closed, double circulation
closed = ?
blood confined to heart and blood vessels
circulatory routes
closed, double circulation
double = ?
2 routes (pulmonary + systemic)
Name the 3 types of circulations in the adult circulation
- pulmonary circulation
- systemic circulation
- coronary circulation (visible externally)
pulmonary circulation
step 1:
right ventricle to lungs via pulmonary arteries (deoxy blood)
pulmonary circulation
step 1: right ventricle to lungs via pulmonary arteries (deoxy blood)
step 2:
pick up oxygen in lungs via capillaries
pulmonary circulation
step 1: right ventricle to lungs via pulmonary arteries (deoxy blood)
step 2: pick up oxygen in lungs via capillaries
step 3:
lungs to left atria via pulmonary veins (oxygenated blood)
pulmonary circulation
starts at the:
right ventricle (deoxy blood)
pulmonary circulation:
from the right ventricle to
pulmonary arteries (deoxy blood)
pulmonary circulation:
from pulmonary arteries to
capillaries in respiratory portion of lungs (oxy blood)
pulmonary circulation:
from capillaries in respiratory portion of lungs to
pulmonary veins (oxy blood)
pulmonary circulation:
from pulmonary veins to
left atrium
Systemic circulation
step 1:
left ventricle to organs via aorta (oxygenated)
systemic circulation
step 1: left ventricle to organs via aorta (oxygenated)
step 2:
organs remove oxygen via capillaries
systemic circulation
step 1: left ventricle to organs via aorta (oxygenated)
step 2: organs remove oxygen via capillaries
step 3:
organs to right atrium via superior + inferior vena cava (deoxygenated)
overall route of systemic circulation
and name the subdivisions
cerebral =
heptatic =
coronary =
left ventricle to right atrium = systemic circulation
subdivisions
cerebral = brain
heptatic = liver
coronary = heart
draw the coronary circulation

fetal circulation
step 1:
fetus gets O2, nutrients from + expels wastes to mothers blood
fetal circulation
step 1: fetus gets O2, from nutrients from + expels wastes to mother’s blood
step 2:
- exchange site in the placenta
- blood supplies in close together, but do not mix
fetal circulation
differences from adult circulation
- umbilicle vein…
- lungs + liver…
- umbilicle arteries…
- umbilicle vein (towards fetal heart)
- lungs + liver basically non-functional
- umbilicle arteries (away from fetal heart)
name the 3 main parts of the body that is different between the adult circulation and the fetal circulation
- umbilicle vein (towards the fetal heart)
- lungs + liver basically non functional
- umbilicle arteries (away from fetal heart)
fetal circulation: differences from adult circulation
umbilical vein (towards the fetal heart)
- carries oxygenated blood from placenta to vena cava
fetal circulation: differences from adult circulation
lungs + liver basically non functional
- 3 shunts to bypass (although some blood flow to these organs for nourishment/growth
fetal circulation: differences from adult circulation
lungs + liver basically non functional
i.
ii.
iii.
i. ductus venosus
ii. foramen ovale
iii. ductus arteriosus
fetal circulation: differences from adult circulation
lungs + liver basically non functional
ductus venosus
- connects _________ (oxy or deoxy?) to __________ (oxy or deoxy?) to _______ liver
- connects umbilical vein (oxy blood) to inferior vena cava (deoxy blood) to bypass iver
- permits most of the oxygenated blood coming from the placenta to bypass the liver
- oxy and deoxy blood mixes
- mixed blood enters fetal heart via inferior vena cava
in the fetal circulation
mixed blood enters fetal heart via
inferior vena cava
Fetal circulation: Differences from adult circulation:
foramen ovale
- hole in where?
- allows what?
- hole in interatrial septum
- allows blood to move from the right to left atrium (bypass lungs)
what allows blood to move from the right to the left?
a) ductus venosus
b) foramen ovale
c) ductus arteriosus
foramen ovale
Fetal circulation: Differences from adult circulation:
ductus arteriosus
- connects what?
connects pulmonary trunk + aorta (bypass lungs)
Fetal circulation: Differences from adult circulation:
umbilical arteries (away from fetal heart)
- returns what
returns mixed blood to placenta
what returns mixed blood to placenta?
a) umbilical veins
b) lungs and liver
c) umbilical arteries
d) ductus arteriosus
umbilical arteries