Eczema on your scalp is the same as it is everywhere else, except for two complications. 1  most people have hair on their heads, which makes it difficult and unsightly to apply thick creams and ointments. 2  itâs right out in the open where everyone can see.
The alveolar epithelium comprises two main cell types: the alveolar type I and alveolar type II cell.The type I cell is a complex branched cell with multiple cytoplasmic plates that are greatly attenuated and relatively devoid of organelles; these plates represent the gas exchange surface in the alveolus.On the other hand, the type II cell acts as the caretaker of the alveolar compartment.he type I cell is a complex branched cell with multiple cytoplasmic plates that are greatly attenuated and relatively devoid of organelles; these plates represent the gas exchange surface in the alveolus. On the other hand, the type II cell acts as the caretaker of the alveolar compartment.
1 Describe the changes in the type of epithelium throughout the respiratory system. 2  Explain how the structure of different segments of the respiratory airways reflect the functional roles that these airways play in air movement and gas exchange.espiratory bronchioles also have cuboidal epithelia, but contain some alveoli. Alveolar Sac and Alveolus: An alveolar sac contains many alveoli. Type I and Type II Pneumocyte: Type I pneumocytes are squamous cells that support gas exchange; type II pneumocytes are cuboidal and create pulmonary surfactant.