In which of the following is a closed circula | vedclass

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(B) closed circulatory system is one where blood is confined within vessels (arteries,veins,and capillaries). Among the given options,$A$,$C$,and $D$

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Tadpole/Fish

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(B) closed circulatory system is one where blood is confined within vessels (arteries,veins,and capillaries). Among the given options,$A$,$C$,and $D$ (Cockroach,Mosquito,and Housefly) are arthropods,which possess an open circulatory system where blood flows into body cavities called sinuses. $B$ (Tadpole/Fish) belongs to the phylum Chordata,which is characterized by a closed circulatory system where blood is pumped by the heart through a network of closed vessels.

$(1)$ Notochord present only in larval stage.	$(a)$ Chordata
$(2)$ Notochord present throughout life.	$(b)$ Vertebrata
$(3)$ Notochord is replaced by vertebral column.	$(c)$ Cephalochordata
$(4)$ Notochord is mesodermal in origin.	$(d)$ Urochordata

In which of the following is a closed circulatory system found?

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