Differences between avian and mammalian respiration Respiration in birds is much different than in mammals. z Birds have a larynx, but it is not used to make sounds. Instead, an organ termed the syrinx serves as the voice box.. z Birds have lungs, but they also have air sacs. Birds do not have a diaphragm; instead, air is moved in and out of the respiratory system through pressure changes in the air sacs. Muscles in the chest cause the sternum to be pushed outward. This creates a negative pressure in the air sacs, causing air to enter the respiratory system.
Don Quixote did not have many possibilities to read but he took advantage of everything he could find spending his entire fortune on volumes filled with the adventures of the greatest knights in the world. As a result Don Quixote lived like a child seeing things just the way children do when playing.
1 With that decided, Don Quixote attacks one of the carriers with his sword and gives him a deep gash in his shoulder. 2  He and Sancho Panza quickly get surrounded and are beaten down by the carriers. 3  The carriers then run away, worried that they might have just committed murder. Don Quixote and Sancho spend the next two hours in the woods looking for the woman named Marcela. 2  When they can't find her, they emerge back into a pretty meadow.