Answer:
1. All animals have tissue
Animals have to have organs to live
All animal cells have a specific function
2. Alveoli are tiny sacks who function is to contain and exchange gases such as oxygen and carbon dioxide. the structure of alveoli, as tiny sacks surrounded by tiny blood vessels includes the cells that make up the tissue of the alveoli and the tissue that joins alveoli to the bronchioles, which are part of the lung. the lungs are made of several kinds of tissue, such as the bronchi, bronchioles, and alveoli
(you might want to paraphrase these! <3)