===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.
Ecotourism has done a lot to initiate the countryâs interest in preserving its biodiversity. 1970 was an important year from that aspect: wildlife trade laws were enacted and the National Park Service (SPN) was founded. Costa Rica has about 161 national parks, refuges and other protected natural areas.