bile - n. a yellow or greenish liquid that is made by the liver and that helps the body to digest fats

cubs - n. a young animal that eats meat

exotic - adj. very different, strange, or unusual

gallbladder - n. the organ in the body in which bile from the liver is stored

hibernation - n. to spend the winter sleeping or resting

ivory - n. a hard white substance that forms the tusks of elephants and other animals

needles - n. the unpleasant tingling feeling in a part of your body (such as your arm or leg) as it becomes numb or recovers from being numb

sterilize - v. to make (someone or something) unable to produce children, young animals, etc.