So we would look at the anatomy of birds, who are the direct descendants of dinosaurs, and we'd look at the anatomy of crocodilians, who are their closest living relatives, and then we would look at the anatomy of lizards and turtles, who we can think of like their cousins.
Então, observamos a anatomia das aves, que são descendentes diretos dos dinossauros, observamos a anatomia de crocodilianos, que são os parentes vivos mais próximos, e também a anatomia de lagartos e tartarugas, que podemos pensar como sendo seus primos.