25 Questions
What is the function of the umbilical arteries in fetal circulation?
Carry deoxygenated blood from the fetus to the placenta
What is the purpose of the foramen ovale in the fetal heart?
Allow blood to bypass fetal lungs and enter systemic circulation
Where does the ductus arteriosus connect in the fetal heart?
Pulmonary artery to the aorta
What is the role of the ductus arteriosus in fetal circulation?
Allow blood to bypass fetal lungs and enter systemic circulation
Why is it important for fetal blood to bypass non-functional lungs?
To maximize oxygen supply to vital organs like the brain
What is the initial structure that forms from the fusion of paired endothelial strands during early embryonic development?
Endocardial tubes
Which structure in the embryonic heart serves as a collecting chamber for deoxygenated blood returning from the body?
Sinus venosus
During fetal development, what plays a crucial role in the exchange of nutrients and oxygen between the fetus and the placenta?
Umbilical arteries and vein
What region of the embryonic heart tube contributes to the formation of the outflow tracts of the ventricles and the aorta and pulmonary arteries?
Bulbis cordis
Which structure gives rise to the left and right atria as the embryonic heart develops?
Sinus venosus
What undergoes extensive remodeling and septation to contribute to the formation of outflow tracts during embryonic development?
Bulbis cordis
Which structure serves as a collecting chamber for deoxygenated blood returning from the body before it enters the developing heart?
Sinus Venosus
What region of the embryonic heart tube contributes to the formation of the outflow tracts of the ventricles and the aorta and pulmonary arteries?
Bulbis Cordis
What happens to the single atrium during embryonic heart development?
It divides into left and right atria
Which structure in the developing heart initially gives rise to a single ventricle?
Ventricle
What role do the umbilical arteries and vein play during fetal development?
Exchange of nutrients and oxygen between fetus and placenta
Which part of the embryonic heart tube elongates and undergoes looping to give rise to the ventricles?
Ventricle
What is the fate of the bulbus cordis during embryonic heart development?
It contributes to the formation of outflow tracts and major arteries
What is the primary function of the umbilical arteries during fetal development?
To carry deoxygenated blood from the fetus to the placenta
What is the primary function of the foramen ovale in the fetal heart?
To bypass the non-functional fetal lungs and directly enter the systemic circulation
What is the primary function of the ductus arteriosus in the fetal heart?
To allow most of the blood from the right ventricle to bypass the fetal lungs and enter the systemic circulation
What is the primary reason for the adaptation of the foramen ovale and ductus arteriosus in the fetal heart?
To maximize the oxygen-rich blood supply to vital organs during fetal development
Which of the following statements accurately describes the role of the umbilical vein during fetal development?
It carries oxygenated blood from the placenta to the fetus
Which of the following statements accurately describes the role of the placenta during fetal development?
It serves as a site for the exchange of oxygen and nutrients between the fetus and the mother
Which of the following statements accurately describes the fetal circulation during development?
The fetal lungs are non-functional, and the foramen ovale and ductus arteriosus are open
Explore the stages of embryonic heart development, from the formation of endocardial tubes to the development of the four chambers such as sinus venosus and atrium. Learn about the journey of the heart's growth during early embryonic stages.
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