In the fetus, the foramen ovale and ductus arteriosus are patent (open). They close after birth. What is the purpose of these two openings during fetal development? O To supply blood flow to the myocardium. To allow blood to bypass the lungs. To connect blood flow to the placenta. O To assist in closure of the valves. O To connect the left and right ventricle.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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In the fetus, the foramen ovale and ductus arteriosus are patent (open).
They close after birth. What is the purpose of these two openings during
fetal development?
O To supply blood flow to the myocardium.
O To allow blood to bypass the lungs.
To connect blood flow to the placenta.
O To assist in closure of the valves.
O To connect the left and right ventricle.
Transcribed Image Text:In the fetus, the foramen ovale and ductus arteriosus are patent (open). They close after birth. What is the purpose of these two openings during fetal development? O To supply blood flow to the myocardium. O To allow blood to bypass the lungs. To connect blood flow to the placenta. O To assist in closure of the valves. O To connect the left and right ventricle.
The cardiac muscle cells in the atria are electrically separated from the
cardiac muscle cells in the ventricles. Which of the following is
responsible for this?
O papillary muscles
O atrioventricular (AV) node
O pericardial fluid
O sinoatrial (SA) node
connective tissue surrounding the valves
Transcribed Image Text:The cardiac muscle cells in the atria are electrically separated from the cardiac muscle cells in the ventricles. Which of the following is responsible for this? O papillary muscles O atrioventricular (AV) node O pericardial fluid O sinoatrial (SA) node connective tissue surrounding the valves
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