BIOL-3030 Study Guide - Midterm Guide: Aortic Arches, Posterior Nasal Apertures, Aorta
Document Summary
Most shift from gills (larvae) to lungs (adults) They use the gills, lungs and the skin. Lungs are used more and more as temperature increases and as activity increases. Ventilation process of moving air in and out of the lungs. Ventilation cycle: frog drops the floor of their mouth. Increases the volume of the mouth cavity in the throat (buccal cavity) Glottis connection between buccal cavity and lungs. Glottis is closed at this point: nostrils close. Glottis closes. osscilation of buccal cavity to clear out deoxygenated air: glottis opens. Body wall muscles compress the chest and air is released. Tadpole vs adult stage (shifting from using gills to using lungs) 3 sets of veins deliver blood to hearth (right atrium/auricle) Vein 2 vitelline from gut organs. Vein 3 posterior cardinal everywhere else from the body. Heart pumps this deoxygenated blood to the external caroid arteries to the head.
