2007-01-17 15:44:15 · 5 answers · asked by HeyDude 3 in Science & Mathematics ➔ Biology
The answers are all so informative I could not pick one "best Answer". so I put it to a vote. Thanks All !!
2007-01-20 05:58:16 · update #1
Mammals normally have four-chambered hearts, though some individual organisms (even humans) can have congenital variants.
Amphibians, such as frogs, have three chambers -- both atrial (top portions) but a single ventricle. This makes for a less efficient separation of the oxygenated and deoxygenated blood, but their system has worked well enough for a few hundred million years.
"Lower" animals, such as worms, have more primitive pulsatile tissue that form arches, but you can't really call it a multi-chambered heart.
Then you get down to really primitive animals that get their circulation accomplished by osmosis and random circulation of cellular fluids. They don't even have a circulatory system!
So, there you go.
2007-01-17 15:52:29 · answer #1 · answered by Richard B 4 · 1⤊ 0⤋
i would like to point out that cyclinders in a car doesnt directly effect it performance depends on the size of each cylinder. However a 12 cyclinder jag does run smoother than an 8 cyclinder corvette but the vette has more power. Furthmore belive it or not but a heart works a little different that a car. Terrible comparison.
2016-05-24 02:20:42 · answer #2 · answered by Anonymous · 0⤊ 0⤋
No. Earthworms have 5 pairs of aortic arches -- no complete chambers. Fish have two chambered hearts. Reptiles and amphibians have three chambered hearts.
2007-01-17 15:50:07 · answer #3 · answered by novangelis 7 · 1⤊ 0⤋
No, amphibians (eg, frogs) and reptiles (eg,lizards) have 3-chambered hearts, and fish have 2-chambered hearts
2007-01-17 15:53:15 · answer #4 · answered by Ianae 2 · 1⤊ 0⤋
No, fishes (generally speaking) only have two, frogs and newts 3 reptiles 3.5
2007-01-17 15:50:34 · answer #5 · answered by Alegría 2 · 1⤊ 0⤋