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.
The heron is a wading bird. There are about 60 kinds of herons, including egrets and bitterns.
Shock is an extremely serious and life-threatening condition for a cat. Shock is a reaction to heavy internal or external bleeding. Learn what to do when a cat is suffering from shock.