Week 2 - Fetal Circulation WKSHT Flashcards
Fetal circulation
Veins –
Arteries –
Veins bring blood to fetus - the goodies
Arteries take blood and waste away from fetus to dispose in mom
In an adult, an artery takes blood away from the. ________ and delivers it to the _________ in the pulmonary circuit OR the __________ in the systemic circuit
Heart
lungs
body
Umbilical artery takes blood ______ from the fetus toward the mother for disposal of waste, whereas the Umbilical vein returns blood to the fetus away from the mother to _______ nutrients and oxygen
away
deliver
Fetal circulation is not the same as that found in an adult (child). Address the following points to review the distinctive features & their respective functions
Fetus gets all oxygen, nutrients from mom & waste processing all done by mom
for a fetus - is there a requirement to have full separation of the pulmonary & systemic circulation for the developing fetus?
NO –
Pulmonary does not perform gas exchange in fetus - it is still developing and not fully functional
Define the function:
Ductus Venosus
Bypasses liver (not functioning) drains to inferior vena cava
Define the function:
Ductus Arteriosus
Bypasses lungs (not functioning) connects pulmonary artery to descending aorta
Define the function:
Foramen Ovale
Bypasses lungs (not functioning) connects Right and Left atria
In adults, nutrients absorbed from the intestines are taken to the liver for processing, detoxification, & storage before they are sent to the circulation in general. The fetus does not need this route because they receive their nutrients from ______.
Therefore the specialized blood vessel in fetal circulation bypasses this route is called ________
and takes blood to the ______
MOM
Ductus Venosus
Inferior Vena Cava
In adults, oxygenating of blood occurs when blood is pumped from the _____ventricle to the lungs through the ______ (blood vessel name) and then is returned to the _______atrium through the ___________ (blood vessel name) & pumped to the body.
Right ventricle
Pulmonary Artery
Left Atrium
Pulmonary Vein
In a developing fetus they obtain their oxygen from ______, so the ______(blood vessel name) connects directly to the ________ creating a bypass of the lungs
Mom
Pulmonary Artery
Descending Aorta
In adults, if the right & left atria had a hole in the septum that separates these chambers the overall oxygenation level of the blood being pumped to the body would ________(decrease or increase). ??
decrease
The mixing of atrial blood is not an issue in the developing fetus because they receive their oxygen from _______. The name of the hole connecting the two atria is called ____.
Mom
Foramen Ovale
