General and Systemic Histopathology, C601&C602
    Slide 89: Infant lung with hyaline membrane disease
    The lung tissue here is quite "meaty," and may not even appear as lung to you.  Fetal lung looks much like this, although in this case there is extensive atelectasis along with the accumulation of the alveolar proteinaceous material.  See how many aspects of pulmonary histology you can identify in this slide.

    See this slide with the virtual microscope.

    Infant lung looks considerably different from adult tissue. Note how much more cellular and thick walled the alveoli are. The vessels are quite congested. The "hyaline membranes" are deposits of pink staining proteinaceous material in the alveolar spaces. They are not continuous, but appear as half moon shaped deposits. They are hard to see at first, but once you have picked them up, they will start to appear all over the slide. What caused this condition? Do adults have something similar?

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