Respiratory System: The network of organs and tissues that help you breathe

Bronchus Trachea Larynx Epiglottis Epithelial Basal Endothelial Apical Respiratory Some extracellular matrix (ECM) material helps connect the alveoli to the capillaries; the presence of this material causes the alveoli to The alveoli lie immediately adjacent to the capillaries around the lungs; the alveoli's spherical shape is nothing more than the result of the capillaries' generally round shape The epithelial cells of the alveoli have a natural tendency to form spherical shapes; the alveoli's shape is a result of this tendency and is somewhat of a biological accident Alveoli's spherical shape gives them the maximal amount of surface area possible for their volume; this large surface area allows for highly efficient gas exchange between the blood and the air in the lungs Simple cuboidal epithelium Simple columnar epithelium Simple squamous epithelium Stratified squamous epithelium Trachea Microvilli Alveoli Secretory vesicles Bronchi The cuboidal or round type 2 alveolar cells The very thin type 1 alveolar cells Clara cells The phagocytic alveolar macrophages Four Five Three One Two Bronchiole All of these structures are found within the respiratory system Alveoli Pharynx Trachea Bronchioles Lungs Trachea Larynx Pharynx Pharynx, larynx, trachea, bronchi, lungs Trachea, bronchi, larynx, pharynx, lungs Larynx, pharynx, bronchi, trachea, lungs Bronchi, pharynx, larynx, trachea, lungs Larynx, trachea, bronchi, pharynx, lungs