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One difference is their blood pigment. Vertebrates' blood pigment is haemoglobin (red color), whereas invertebrates (which have bloods) possess haemocyanin (blue-green in color) mostly and possibly other pigments but not haemoglobin.
-Hemoeritine(no color)-don't remember where
There is also a difference between blood cells:
Invertebrates have only one type of cells: there are named amibocytes and have a main function in imunity
Vertebrates have red blood cells, leucocytes and cell plates
Also a notable thing is that the circular fluid is named blood only at vertebrates. At invertebrates it is named hemolimph(translation probably wrong )
In most bloody invertebrates, the circulatory system is an open system - the hemolymph (this is the best spelling hehe ), except annelids.
In all vertebrates, the circulatory system is a close system - the blood and the lymph.
Actually the lymph circulatory in vertebrates is an open system.
Now, I would like to know how you define and distinguish between open circulatory system vs close circulatory system correctly.
Because here in my country, in high school level teachers usually put a wrong definition for students (what a pity! ) so when they continue to study in university/college, especially in my faculty we have to "wash their brain" and change their "ideology" about those two statements
Open-the hemolimph passes through open spaces, that do not have their own walls, when the go from arteries to veins. Did i pass?
Oh yeah... Invertebrates can have hemoglobine but it is not inside cells, it is dissolved in the hemolimph like all other pigments
You are correct, Andrew
My students used to have this definition: "Open circulatory system does not have vessels, after come out from heart, bloods enter the tissues directly". Whoaaa... Of course this system has artery (aorta) to flow bloods from heart to the tissues and vein to collect haemolymph from the tissues back to the heart. There is a period when bloods flow inside their vessels and in another period they flows outside their vessels, the haemolymph
Can you tell me the invertebrate specimen that has haemoglobin?
Oh not neccessary, I found them myself: nematodes, annelids, some echinoderms, some mollusks...
Lol... come on... You can't test things like that on me... I am a geek.. I want to go to IBO... Ask normal people and see if they know... To me it seems pretty simple...
Aha! No, I did not test you, I really completely forgot about invertebrates that possess haemoglobin. I think only human has that, ohohohoh sounds egocentric huh? Well, I am too long off from animals and stuck into human stuff awawawaaaaa I missed my Zoology class
i was reffering to the open/closed circulatory sistem
10 posts • Page 1 of 1
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