There are two types of bile duct cancer: 1  Intrahepatic bile duct cancer : This type of cancer forms in the bile ducts inside the liver. 2  Extrahepatic bile duct cancer : The extrahepatic bile duct is made up of the hilum region and the distal region.
Crocodiles (subfamily Crocodylinae) or true crocodiles are large aquatic reptiles that live throughout the tropics in Africa, Asia, the Americas and Australia. Crocodylinae, all of whose members are considered true crocodiles, is classified as a biological subfamily. A broader sense of the term crocodile, Crocodylidae that includes Tomistoma, is not used in this article. The term crocodile here applies only to the species within the subfamily of Crocodylinae.
Both alligators and crocodiles are members of the reptilian order Crocodylia, however they belong to different families. There are a total of 23 types of crocodilians (belonging to the Crocodylia order), including these two. Crocodilians date back 240 million years, thatâs 65 million years more than the dinosaurs.ome crocodiles, such as the Nile crocodile, have even been known to eat humans. Also, crocodiles are famous for their temper and are considered far more aggressive than the alligators. Further differences between crocodiles and alligators include: Alligators. Crocodiles. Family. Alligatoridae. Crocodylidae. First appeared.