lecture 9: Changes in the Circulatory and Respiratory Systems at Birth Flashcards
fetal respiratory and circulatory conditions include?
- lungs are small and collapsed.
- lungs filled with amniotic fluid
- lung volume too small to allow complete output of right atrium through lung circuit
- there is enough blood flow to allow growth and development, but not gas transfer
- no need for gas transfer in lungs while in utero
the _____ _____ is a connection between the sixth aortic arch (pulmonary arch) on the left side and the arch of the aorta.
ductus arteriosus
the _____ ______ is a hole between the right and the left atria, allowing blood to pass from the right side to left and not get pumped to lungs.
foramen ovale
the _____ _____ allows blood to skip past the lungs and join up with the blood that is being pumped out of the left ventricle.
ductus arteriosus
spent blood from the the fetus goes to mom via the ______ _____.
umbilical artery
remember that the distal end of the internal iliac artery is the old connection of the ______ ______ which goes toward the placenta.
umbilical artery
branches off of the internal iliac artery would be?
- middle rectal
- internal pudendal
- inferior rectal
- inferior vesical
- superior vesical
arterial blood from the placenta is?
laden with nutrients and oxygen from the mother, then comes to the fetus via the umbilical vein hooked up to the inferior vena cava
the blood returning to the fetal heart is actually partially _____ and _____ ____.
oxygen, nutrient rich
more oxygen-rich blood from inferior vena cava passes through ______ ___ over to the left side.
foramen ovale
from left atrium, moderately oxygen-rich blood passes to left ventricle and then out ___ ___ ____.
arch of aorta
bloood richest in oxygen and nutrients goes to _____ ___, _____, _____, and ____.
heart wall, head (brain),neck, arms
somewhat more oxygen/nutrient depleted blood from superior vena cava - of course - enters ____ atrium, then ____ ventricle, then _____ _____.
right, right, pulmonary artery
most of the right ventricular blood exits via the left pulmonary arterial branch - then to the _____ _____.
ductus arteriosus
_____ ____ enters the infers vena cava. but soon they hook up with the hepatic portal system.
umbilical veins
the right _____ ______ eventually degenerates, leaving only the left.
umbilical vein
_____ _____ - a new pathway from the placenta to the upper region of the inferior vena cava bypasses the liver.
ductus venosus
_____ _____ - it runs straight from the umbilical vein, bypassing the liver, to the inferior vena cava.
ductus venosus
(circulatory changes at birth)
if fetal circa;story pattern were to persia after birth, right arterial blood would continuously spill to the left side via the _____ _____.
foramen ovale
(circulatory changes at birth)
blood of the _____ ______ would miss the lungs and go to the aorta, mixing there.
pulmonary arch
(circulatory changes at birth)
a result of _______ - is a lack of adequate oxygen in arterial blood.
hypoxia
(circulatory changes at birth)
______ would be bypassed continuously, deteriorating quickly.
lungs
review lecture 9: the circulatory changes at birth (all parts) I,II,III
review
_____ _______ can combine with oxygen even more easily than _____ ______ - so it can pick oxygen off of the adult hemoglobin.
fetal hemoglobin, adult hemoglobin
