Do fish have hearts?
Sometimes it is hard for us to imagine that creatures which are so unlike us have organs very much like ours that function in the same way. Many people think that because a fish lives in the water and is cold-blooded it must lack various organs, or not have certain senses. Actually, the anatomy of a fish is very much like that of higher warm-blooded animals. In fact, many scientists believe this similarity is evidence that life on land evolved from life in the sea! Fishes breathe and digest food. They have a nervous system and suffer pain and physical discomfort. They have a very keen sense of touch. They taste as well as feel with their skin. They have two small organs of smell located in the nostrils on the head. They even have ears, but these are internal. Fish have no external ears. Their eyes are similar to those of other vertebrates, but less complicated in structure. So you see a fish has systems to carry on various processes just as we have.
