Lizards, like many vertebrates, have lungs and a respiratory system that enables them to breathe. They are different from mammals and birds in that they don't have a diaphragm muscle and instead breathe by flexing their body muscles.Continue Reading
Since they need to use their muscles to breathe, lizards typically hold their breath while doing intense activity. Some lizards can bypass this limitation by using their throat muscles to pull air into their lungs during activity.
Not all reptiles use body muscle-based breathing. Crocodiles and turtles have developed different methods for breathing. Crocodiles have a diaphragm which enables them to inhale air, while turtles, whose lung expansion is limited by their shells, have a thin muscle layer that lies on their lungs and expands and contracts to bring in air.Learn more about Lizards
Lizards reproduce in different ways. While most lizards reproduce by laying eggs after a female is inseminated by a male, other types of lizards reproduce asexually, meaning they do not need a mate in order to produce offspring.Full Answer >
The National Heart, Lung and Blood Institute lists inflammation and narrowing of the airways in the lungs as asthma's primary effects on the respiratory system. The airways in people with asthma are swollen and easily affected by inhaled contaminants. Exposure to contaminants causes the airways to further constrict and swell, and cells in the airways produce excess mucus which exacerbates airway narrowing. These events trigger the symptoms of asthma.Full Answer >
In the respiratory system, gas exchange occurs between the alveoli in the lungs and the capillaries. Alveoli are small cavities lined with thin membranes. The cavities expand and contract as a person breathes. Humans have approximately 300 million alveoli in their lungs, advises Eastern Kentucky University.Full Answer >
Phlegm that is coughed up from the lungs signals the presence of an infection or disease of the lower respiratory system, says Everyday Health. A physician must evaluate the material to determine its cause and whether antibiotic or alternative treatment is needed.Full Answer >