Question

what is haemal and prehaemal system

Answer 1

These canals, referred to as an haemal system, is how they get the bad gases out of their bodies and the good gases in and help to transport blood and body fluids around the body cavity. Their blood and fluids are pumped around their body by their water vascular system, which is found in all echinoderms

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Answer 2

Haemal

• It is made up of inter communicating tubes.
• It contain coelomic fluid with coelomocytes.

Prehaemal

• It consists of tubular sinuses.
• This system transport substances like food, sex cell from gonad etc.

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