Pet Care Center: Fish
The PetMD Pet Care Center provides you with useful information about grooming, nutrition, training and wellness for your pet.
How a Fish's Immune System Works
All fish have an immune system to fight diseases, although the system is by no means as advanced as the ones found in mammals. The system breaks down into two main parts: protection...
How Fish Metabolism Works
“Metabolism” is the word used to cover the system of chemical processes that keep something alive. For a fish, that means providing energy to power critical body processes or building...
The Cardiovascular System in Fish
A fish’s cardiovascular system comprises of two main parts: the heart and the system of pipes (veins, arteries and capillaries) that carry blood throughout the body. Every organ and...
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