This card describes closed circulatory systems, where blood remains within vessels under pressure, allowing for efficient gas transport and regulation of blood flow.
Tato karta popisuje uzavřené oběhové systémy, kde krev cirkuluje v cévách pod tlakem, což umožňuje efektivní transport plynů a přizpůsobení průtoku krve.
| Front | Closed circulatory system 3.1.2(b) |
|---|---|
| Back | - blood within vessels (no direct contact with cells) - heart pumps blood Under pressure (around body to heart again) which obtains waste via diffusion through walls of vessel - blood flow adjusted by widening/narrowing of vessels, blood pigment carries respiratory gases, - normally in echinoderms and all vertebrate groups |
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