Question

Difference between closed and open circulation

Answer 1

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Circulatory system is said to be open if the blood runs in open space called sinuses and moreover organs are in direct contact with blood.

⠀⠀⠀⠀⠀⠀⠀⠀⠀while

Circulatory system is said to be closed if blood runs in a closed vessel having definite boundaries and path ( blood vessels & capillaries ) and moreover organs are not in direct contact with blood.

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Answer 2

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$\small\underline\mathbb\pink{{In\:Open\:Type\:Of\:Circulation}}$ ,blood flows through vessels and sinuses.capillaries are absent.

Ex :- Leeches,Arthropods,molluscs,Echinoderms,Ascidians.

$\small\underline\mathbb\orange{{In\:closed\:Type\:Of\:Circualtion}}$ ,blood flows through blood vessels.capillaries are present .

Ex:- Annelidia,Cephalopoda,Cephalochordata,Vertebrata.

$\large\underline\mathbb\green{{Hope\:This\:Will\:Help\:You}}$