Pulmonary alveolus thin fluid coating within all alveoli. The fluid coating is produced by the body in order to facilitate the transfer of gases between blood and alveolar air. The surfactant is produced by the type II cells which are the most numerous cells in the alveoli, yet do not cover as much surface area as the squamous alveolar cells (a squamous epithelium). Type II cells also repair the endothelium of the alveolus when it becomes damaged. Insufficient surfactant in the alveoli can contribute to atelectasis (collapse of part or all of the lung). Without pulmonary surfactant, atelectasis is a certainty; however,
Invasion of the Body Snatchers (1978 film) Invasion of the Body Snatchers (1978 film) Invasion of the Body Snatchers is a 1978 American science fiction horror film directed by Philip Kaufman, and starring Donald Sutherland, Brooke Adams, Veronica Cartwright, Jeff Goldblum and Leonard Nimoy. Released on December 22, 1978, it is a remake of "Invasion of the Body Snatchers" (1956), which is based on the novel "The Body Snatchers" by Jack Finney. The plot involves a San Francisco health inspector and his colleague who discover that humans are being replaced by alien duplicates; each is a perfect copy of the person replaced, only devoid of human emotion.