Compare humans inhaling and exhaling to how gills work. Humans | Fish |
Inhaling:
Exhaling

Explanation:

Gills and lungs are the two types of respiratory systems that occur in vertebrates.  

Their main function is to facilitate gas exchange.  

useful link :

https://pediaa.com/what-is-the-difference-between-gills-and-lungs/#:~:text=The%20main%20difference%20between%20gills,while%20mostly%20tetrapods%20use%20lungs.

4.) metal

"-the movement of carbon from the nonliving environment into living things and back to the environment

-carbon is the essential component of proteins, fats, and carbohydrates (which make up all organisms)

-carbon exists in air, water, and living organisms

-producers convert carbon dioxide in the atmosphere into carbohydrates during photosynthesis

-bacteria in the atmosphere cycles through the system in filtration units

-in cellular respiration, carbon is released back into the atmosphere as carbon dioxide

-some carbon is stored in limestone (forming one of the largest "carbon sinks" on earth)

-largest carbon reservoir on earth= limestone

-carbon stored in the bodies of organisms as fat, oils, or other molecules may be released into the soil or air when the organism dies

-this may form deposits of coal, oil, or natural gas (fossil fuels, which increased the atmospheric carbon dioxide)

-fossil fuels store carbon left over from bodies of organisms that died millions of years ago

-they are located in the surface of earth, deep within the earth and beneath the ocean floor."    

you should wear a lead protective shield when having teeth x-rays

hope i

-lavira : )