Answered: One genus in Phylum Platyhelminthes is…

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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9. One genus in Phylum Platyhelminthes is Turbellaria, which consists of free-living worms with a thin, flattened body form. Their body has to be flat because

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a. Their body is supported by spicules, which only provide support if the body is flat

b. They rely on diffusion across their body wall for gas exchange

c. It allows space for their complete digestive system

d. It makes their nematocytes more efficient at capturing prey

e. It makes their circulatory systems more efficient at transporting gasses and nutrients

Definition Definition Organ system that helps in the digestion of food by mechanical and biochemical processes. The digestive system breaks down food into simpler components that enable the body to then absorb or transport nutrients. The human digestive system includes the gastrointestinal tract or alimentary canal and the associate glands. The organs of the gastrointestinal tract include the mouth, pharynx, esophagus, stomach, small intestine, and large intestine. The associated glands include salivary glands, liver, gallbladder, and pancreas.

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