The Respiratory System of an Ectoproct Involves

question 6

Multiple Choice

The respiratory system of an ectoproct involves

• A)tracheae.
• B)gills that form another layer under the tentacles.
• C)amebocytes loaded with hemoglobin pigment.
• D)circulation of water by opening and closing the epistome.
• E)no system at all,merely diffusion across the body surface.

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