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.
Portanto, observámos a anatomia das aves que são os descendentes diretos dos dinossauros, observámos a anatomia dos crocodilos, que são os parentes vivos mais próximos e depois observámos a anatomia de lagartos e tartarugas, que podemos considerar como seus primos.