06.05 Fetal Circulation (Anatomy) - Florida Virtual High School AN 3946
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Course
AN 3946
Institution
AN 3946
06.05 Fetal Circulation
Fetal Circulation Circulation of Baby after Birth
How are gases
exchanged?
The umbilical cord contains
one vein that sends
oxygenated blood to the
fetus, and two arteries that
remove the deoxygenated
blood.
Gases are exchanged inside the
lungs through the surface...
06.05 Fetal Circulation
Fetal Circulation Circulation of Baby after Birth
How are gases The umbilical cord contains Gases are exchanged inside the
exchanged? one vein that sends lungs through the surfaces of
oxygenated blood to the thousands of alveoli to allow the
fetus, and two arteries that diffusion of carbon dioxide and
remove the deoxygenated oxygen.
blood.
How are nutrients Nutrients diffuse through Partially digested food (chyme)
absorbed? the villi tissues and transfer moves through the small intestines
between the maternal blood where nutrients are absorbed into
and the vessels of the fetus. the bloodstream.
The villi protect the fetus’s
blood against the maternal
blood in case they have
different blood types.
How are wastes Waste travels out of the Wastes are removed through the
removed? fetus through the umbilical excretory system after passing
cord, to smaller vessels that through either the kidneys (urea/
lie within the villi of the urine) or the digestive tract (feces).
placenta. Maternal blood
fills the spaces that
surround the villi. It is here
where wastes are diffused
into the mother’s blood.
How does blood Umbilical cord ---> ductus Blood is redirected after a change in
flow through the venosus ---> inferior vena blood pressure after birth. Blood now
heart and lungs? cava ---> heart (oxygenated flows through the pulmonary artery to
blood) ---> head/upper the lungs to receive oxygen.
extremities ---> heart ---> a
portion to the lungs --->
largest portion to the ductus
arteriosus ---> lower
extremities/two arteries of
the umbilical cord.
What main The umbilical cord, The lungs (alveoli), the intestines,
structures are placenta, ductus venosus, the pulmonary artery, and the
involved? ductus arteriosus, villi, and excretory system.
maternal blood/nutrients.
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