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.
Crocodiles of the Americas. Most of the world's alligator species are found in the Americas, but only four species of crocodiles are native. The American crocodile is found in the southern U.S. and all the way down to Central and South America. It is a large species, reaching lengths of up to 16 feet.