RESPIRATORY BRONCHIOLES. They are the continuation of the terminal bronchioles and the final division of the bronchioles in the lungs. They are the narrowest airways which deliver air to the exchange surface of the lungs. They can be identified through the presence of alveoli along their walls.
TRACHEA. It is commonly known as windpipe. It is a 4 inches long tube that runs down from the larynx to the sternum. It divides into 2 smaller tubes called bronchi: one bronchus for each lung. It serves as the main passageway for air to pass from the upper respiratory tract to the lungs. Its identifiable feature is its large C-shaped hyaline cartilage rings.
PNEUMOCYTES. They are one of the cells that lined the alveoli of the lungs. They have 2 types: Type I and Type II pneumocytes. Type I pneumocytes are involved in gas exchange. They can be identified by their thin, squamous epithelium. On the other hand, Type II pneumocytes are responsible in the production and secretion of surfactant. They have large cuboidal cells and appear to be foamy.
RESPIRATORY BRONCHIOLES. They are the continuation of the terminal bronchioles and the final division of the bronchioles in the lungs. They are the narrowest airways which deliver air to the exchange surface of the lungs. They can be identified through the presence of alveoli along their walls.
TRACHEA. It is commonly known as windpipe. It is a 4 inches long tube that runs down from the larynx to the sternum. It divides into 2 smaller tubes called bronchi: one bronchus for each lung. It serves as the main passageway for air to pass from the upper respiratory tract to the lungs. Its identifiable feature is its large C-shaped hyaline cartilage rings.
PNEUMOCYTES. They are one of the cells that lined the alveoli of the lungs. They have 2 types: Type I and Type II pneumocytes. Type I pneumocytes are involved in gas exchange. They can be identified by their thin, squamous epithelium. On the other hand, Type II pneumocytes are responsible in the production and secretion of surfactant. They have large cuboidal cells and appear to be foamy.