WebAll aquatic amniotes ( reptiles, birds and mammals) have thick and impermeable cutes that preclude cutaneous respiration, and thus rely solely on the lungs to breathe air. When underwater, the animal is essentially holding its breath and has to routinely return to the surface to breathe in new air.

Mechanisms for Gas Exchange - CliffsNotes

WebGas Exchange in Birds. The avian respiratory system is very different from that of mammals. In mammals the diffusion of oxygen occurs in one organ inside the lungs. "Clean" air, or air with oxygen is taken in through the nasal cavity, through movement in the diaphragm, and is taken to the lungs and diffused into the blood stream from the aveoli ... WebBasic Principles of Gas Exchange Gas exchange during respiration occurs primarily through diffusion. Diffusion is a process in which transport is driven by a concentration gradient. Gas molecules move from a region of high concentration to a region of low concentration. simulationcraft wago

Amphibian and Bird Respiratory Systems - Biology LibreTexts

http://greatblueheronresource.weebly.com/gas-exchange.html WebGas exchange occurs in microscopic dead-end air-filled sacs called alveoli, where a very thin membrane (called the blood-air barrier) separates the blood in the alveolar capillaries (in the walls of the alveoli) from the alveolar air in the sacs. Exchange membrane [ edit] Fig. 4. WebGas Exchange Between Alveolar Spaces and Capillaries The function of the respiratory system is to move two gases: oxygen and carbon dioxide. Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. rcvs rules of certification