===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.
By the early 1990s, Costa Rica became known as the poster child of ecotourism, with tourist arrivals reaching an average annual growth rate of 14% between 1986 to 1994.ccording to the Costa Rican Tourism Board, 47% of international tourists visiting the country in 2009 engaged in activities related to ecotourism, which includes trekking, flora, fauna, and bird watching, and visits to rural communities. However, most visitors look for adventure activities.