Regarding blood circulation it may be said that in pheretima the dorsal vessel is a

Blood circulation in insects :

Explain the blood circulation in humans.

Open blood circulation is found in

Blood circulation in earthworm is :

Assertion :- Blood circulation is absent in epithelium tissue Reason :- Blood vessels are unable to pierce basement membrane.

Assertion: Blood circulation is absent in epithelium tissue. Reason: Blood vessels are unable to pierce basement membrane.

Assertion: Blood circulation is absent in epithelium tissue. Reason: Blood vessels are unable to pierce basement membrane.

Assertion :- Blood circulation is absent in epithelium tissue Reason :- Blood vessels are unable to pierce basement membrane.

Blood vessel in pheretima having valves is