The Circulatory System of Earthworms Is

question 16

Multiple Choice

The circulatory system of earthworms is

• A)closed with hearts pumping blood to the anterior arteries and veins returning from the posterior.
• B)open with blood "washing" through the coelomic cavity.
• C)half closed with hearts pushing blood toward the head but washing posteriorly through an open cavity.
• D)closed with dorsal and ventral blood vessels joined by five paired "hearts" forcing circulation flow dorsal-ventrally.
• E)absent and they rely solely on diffusion to absorb gases through the epidermis.

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