At the end of this activity, students should be able to: present the factors that affect the diffusion of gases across respiratory surfaces, present the main types of respiratory organs in animals, explain the functioning of gills in fish, present the anatomical features that enable gas exchange on land, using plants and insects as examples, discuss gas exchange in relation to water evaporation from the body surface, and present the main structural features and the principles of lung ventilation in land vertebrates.

Originally released by Learnetic, 2016.