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Fetal Heart & Lung

Advanced Patho EXAM 2

The heart starts beating and blood circulates on what day? 21st day or by the end of the 3rd week
What is the first organ system to reach a functional state? cardiovascular system
When can the embryonic heartbeat be detected by doppler ultrasound? 5th week
True or false, after birth, the foramen ovales are no longer needed so they close. True
During fetal growth, why is the ductus arteriosus important? so that oxygenated blood is provided
What happens to the ductus arteriosus at birth? It should close
What role does prostaglandin play in PDA? can cause constriction of the PDA in premature infants
During pregnancy, when does the laryngotracheal diverticulum develop? by the end of 4th week
When does surfactant production begin? 20-22 weeks
True of false, infants born before 24 weeks have sufficient surfactant to survive. False, they do not have sufficient surfactant to survive without medical aid.
Created by: lbl317537