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Q1. A molecule which is lacking in the lungs of a premature infant is the ______.  It mainly functions to help to keep the alveoli from collapsing. The positive pressure equipment is compulsory in such a condition.

Q2. Large folds in the stomach termed as ______ increase its surface area and as well allow it to fold on itself when empty. The ______ is a valve which allows partially digested food out of the stomach to the ______. The ______ permits food to enter the stomach from the ______. Two key cells in the wall of the stomach generate digestive juices. The ______ cells generate hydrochloric acid and the ______ cells generate enzymes which help to break down proteins.

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