Answered: Compare and contrast the body coverings…

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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Compare and contrast the body coverings of a free-living turbellarian, a monogenaen fluke, a cestode, and a nematode. Which problems does each solve or create? Be sure to consider locomotion, permeability, ciliation, and habitat, and to think of the entire life cycle.

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Free-living Turbellarian

Named after turbulence created by the cilia in water. These are free living bottom dwellers.
Both marine and freshwater.
There are carnivores and scavenger of small insects . Whereas some others are herbivores of algae . They possess chemoreceptors that can detect the chemical from the food that is far away .
They have a gastrovascular cavity with one opening . Highly branched gut transport food to all parts of the body , this is absent in the case of parasitic species ) .
Possess pharynx , a muscular tube that extended out of the mouth and pumps food to the gut.
It possess cilia on the epidermal cells , helps to glide through water and the bottom.. mucus layer is laid to help in adhesion and helps cilia to gain traction.
Muscle cells are controlled by the nervous system and helps then twist and turn for rapid response to the environmental stimuli. The dorsoventral muscle are very essential for maintaining flatness ( for diffusion) .
Protonephridia is a network of fine tubules for the excretion of the metabolic waste.
Can reproduce sexually be and cc asexually. Asexually through budding , fission, fragmentation. Sexually - monecious ( hermoprodite), oviparous ( lays eggs) , penal fencing etc .

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