===Terminal bronchioles=== The terminal bronchiole is the most distal segment of the conducting zone. It branches off the lesser bronchioles. Each of the terminal bronchioles divides to form respiratory bronchioles which contain a small number of alveoli. Terminal bronchioles are lined with simple cuboidal epithelium containing club cells.
Ecotourism in Costa Rica. Ecotourism in Costa Rica is one of the key activities of the tourism industry in the country. By the early 1990s, Costa Rica became known as the poster child of ecotourism. The country is among many developing nations that look to ecotourism as a way of cashing in on the growing demand for this popular trend of travel.
Costa Rica was a pioneer in this type of tourism and the country is recognized as one of the few with real ecotourism. Other important market segments are adventure, sun and beaches.