How did the complexity of the lung structure occur in vertebrates?
| November 13, 2020 | Education
Amphibians have saccular lungs, reptiles have cellular lungs, birds have additional air sacs, and mammals have alveolar lungs.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.