| − | The pneumocytes are a type of epithelial cells that lines up the alveoli. There are types of these cells; the type I pneumocytes are simple squamous with a flattened central nucleus that protrudes into the alveolar lume, and the Type II pneumocytes are round to pyramidal-shaped cells and are found among the type I pneumocytes and they (The type II pneumocytes) have a larger centrally placed nucleus with a prominent nucleolus and a slightly vacuolated, foamy, basophilic cytoplasm. The nucleus of these cells also has a nucleolus.
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