5_WaterBalanceGasExchange

Ventilate lungs no diaphragm mechanism for lung

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Unformatted text preview: horacic aspiration to ventilate lungs (no diaphragm) - mechanism for lung ventilation different between groups Squamata: - intercostal muscles enlarge chest cavity (also used for locomotion => can’t run and breath at same time) buccal pumping Lungs Reptiles: - thoracic aspiration to ventilate lungs (no diaphragm) - mechanism for lung ventilation different between groups Snakes: - left lung reduced - actual respiratory surface abundant in anterior part of lung and gradually decrease => respiration only in anterior part; posterior acts as air sac for gas exchange Lungs Reptiles: - thoracic aspiration to ventilate lungs (no diaphragm) - mechanism for lung ventilation different between groups Crocodiles: - Hepatic piston: muscles from the pelvis pull liver back and forth to ventilate lungs Turtles: - immobile shell! => ventilation via contraction of body wall not possible - some have sheets of muscle within shell that ventilate - move legs in and out to ventilate lungs...
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This document was uploaded on 03/17/2014 for the course BIO SCI 440 at Wisconsin Milwaukee.

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