How does the circulatory system of a fish differ from the circulatory system of a mammal?
Suggest the possible advantages of the design of the mammalian circulatory system over that of a fish.
Tagged with: Circulatory system • fish
Filed under: digestive diseases
Fish have 2-chambered hearts, and O2/CO2 exchange happens across gills instead of lungs.
See this website for interesting graphics and explanations…
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/A/AnimalHearts.html
i don’t think fish have blood
It’s all wet!
I believe they have a two or three chambered heart instead of a four chambered one, with a ridge instead of a seperated atrium. This allows more backflow of blood than within mammals.
Fish have an open circulatory system (hemocoel- a blood cavity) whereas mammals have a closed one (circulatory vessels containing and transporting the blood), I do believe.
A fish circulatory system has only a single circuit, so it’s only a single pump.
A mammal circulatory system is a double circuitl, so it’s a double pump.
Fish have a 3-chambered heart and mammals have 4-chambered hearts. This is significant because, in the 3-chambered design, the oxygenated and de-oxygenated blood mix. It’s less efficient.
Also, fish have a ’single-loop’ circulation and mammals have ‘double-loop’ circulation.
Fish blood follows this path: heart -> gills -> body -> heart
Mammal blood follows this path: heart -> lungs -> heart -> body -> heart
mammals have a double circulatory system n fish have a single system, meaning only 1 atrium and 1 ventricle. blood gets pumped from the heart to the gills and then the body, in mammals blood is pumped from the heart, to the lungs, back to the heart and then the body. this four chambered heart system gives us more energy for active lifestyle because it pumps blood our with a force and pressure.