Question

what do you undesstand by tube within a tube plan​

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

Tube within a tube body plan is a type of body plan with a fluid-filled cavity between the outer body and the inner alimentary canal. This body plan in animals possesses two distinct openings and a complete digestive system. The mouth and anus are the two openings that are involved in food consumption and waste excretion respectively. The inner tube in this body plan extends from the mouth to anus and includes the respiratory organs and digestive system. The body wall of the animals possessing a tube within a tube body plan is known as the outer body.

Explanation:

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