is the heart system closed or open ?

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is the heart system closed or open ?

2006-12-05 01:58:57 · 4 answers · asked by abd_danger_1990 1 in Science & Mathematics ➔ Medicine

4 answers

As a fluid-dynamic system it is CLOSED in humans!

The circulatory systems of all vertebrates are closed: the blood never leaves the system of blood vessels.

2006-12-05 08:25:08 · answer #1 · answered by Jerry P 6 · 0⤊ 1⤋

its "closed " for sure in us n all vertebrates
in lower animal its open type

2006-12-06 08:28:47 · answer #2 · answered by Anonymous · 1⤊ 0⤋

i think it should be open...if its close, there will be no humands on earth....not even animals...

2006-12-05 10:02:06 · answer #3 · answered by Khairudin Bin Salim 4 · 0⤊ 1⤋

open

2006-12-05 13:19:53 · answer #4 · answered by SEENA A 1 · 0⤊ 1⤋