URL:https://textimgs.s3.amazonaws.com/boundless-biology/figure-39-01-05.jpe#fixme
掲載元:https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Book:_General_Biology_(Boundless)/39:_The_Respiratory_System/39.1:_Systems_of_Gas_Exchange/39.1B:_Skin_Gills_and_Tracheal_Systems