13) Which of the below is true about a complete digestive system? Group of answer choices it has only one opening it is less efficient at extracting energy from food than a gastrovascular cavity it can also function as a hydrostatic skeleton it allows food to be eaten while a previous meal is still being digested

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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13) Which of the below is true about a complete digestive system?
Group of answer choices
it has only one opening
it is less efficient at extracting energy from food than a gastrovascular cavity
it can also function as a hydrostatic skeleton
it allows food to be eaten while a previous meal is still being digested
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