Notochord, a flexible supporting rod along the back of an animal. It is present in all chordate animals at some stage in their development. A primitive chordate retains it throughout life. In higher vertebrate animals, the notochord is replaced before birth by a backbone.
Public transportation can be convenient and cheap, but bringing a pet can make your trip cumbersome and costly. Luckily, many transport systems welcome pets.
Fido's practically part of the family, so naturally you'd want him along on vacation. Unfortunately, the local motel may not be as welcoming to your pet as you are. Luckily, pet-friendly hotels abound so you and Fido can relax comfortably.