nothing, a fish is slightly smaller
Difference between a human being and an elephants digestive system?
A polar bear's digestive system is a digestive system and a humming bird is a humming bird.
one is a turtle and the other is straight
Koalas have a system that helps them digest the eculeptas leaves but we do not.
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There are many differences and similarities between a perch and a human in the digestive system. One is the enzymes found in the gut.
Well, clams filter feed, so I don't think they actually have digestive systems at all. I would imagine, with all the stuff floating in seawater, that they simply absorb nutrients out of the brine they filter through themselves.
The major difference between the vascular system of a human and a starfish is that humans have cardio vascular system and starfish have water vascular system.
The poultry digestive system is similar to that of a human. The cow's digestive system is designed so that it chews its cud several times to get the maximum nutrition from it.
The human digestive system when stretched out end to end is about 30 feet long.
The difference between a human-made system and a "natural" system will depend entirely on what the system is. In many cases the human system will be simpler and have a narrow focus.
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