Question

Describe four blood vessels present behind the thirteenth segment in Pheretima.

Answer 1

Earthworm has a system of vessels or tubes in which red blood circulates which transports oxygen, carbon dioxide, digested food and nitrogenous waste to and from the parts of the body. A transportation system, in which blood circulates always in tubes, is called a closed circulatory system. The circulatory system comprises: blood, blood vessel, hearts and blood glands.

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Answer 2

Answer:

Segments behind 13th, i.e., intestinal region by supra-oesophageal which eventually passes its blood to the integument nephridia... ' gut wall, septa, nephridia, septa and reproductive organs, gases. ... Smaller blood vessels, and thebody wall an elaborate system Pheretima!