Respiratory System

Respiration and Breathing

What is respiratory distress syndrome (RDS)?

In a developing embryo pulmonary surfactant is not produced in sufficient quantities until the seventh month of gestation. As the fetus matures, the amount of pulmonary surfactant increases. In premature infants, respiratory distress syndrome (RDS), or hyaline membrane disease, is caused by too little surfactant. This is common, particularly for infants delivered before the seventh month of pregnancy.


This is a web preview of the "The Handy Anatomy Answer Book" app. Many features only work on your mobile device. If you like what you see, we hope you will consider buying. Get the App