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.
The order has three families: Alligatoridae, Crocodylidae, and Gavialidae. Alligators and caimans are in the alligator family; crocodiles are in the crocodile family; and the Indian gharial is in the gavial family.The differences among them seem pretty small, compared to the differences among members of, say, the carnivores.est Answer: Crocodiles typically thrive in saltwater environments and are very aggressive when in comparison to alligators and caimans. Also, the teeth of a croc are visible even when the mouth is closed. Crocodiles also have stubbier, stouter snouts that alligators.