In the canalicular or acinar stage (16–twenty eight weeks pregnancy), numerous alveolar ducts develop off respiratory bronchioles ( , Fig 4)

Alveolar ducts are covered from the type II alveolar structure, which are ready surfactant synthesis. Thin method of I alveolar liner tissue differentiate of method of II cells. Into the conclusion which developmental stage (24–28 days), primitive distal saccules (primitive alveoli) start to function through something also known as number…

Continue reading