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Fetal Heart & Lung
Advanced Patho EXAM 2
| Question | Answer |
|---|---|
| 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. |