Chapter 25.1, Problem 4MI

Summary Introduction

To summarize:

The facts about flatworms in table.

Introduction:

Flatworms are unsegmented, reciprocally balanced worms that do not have a coelom. However, they do have three germ layers. A few structures are free living however many are parasitic.

Explanation of Solution

Some facts about flatworms are listed below:

Size range 1mm to several meters	Number of species about 20,000
Preferred environments freshwater, marine, moist land and inside living bodies	Adaptations for movement of free-living flatwormcilia on undersides, mucous production
Diet of free-living flatworm dead or slow-moving organisms	Symmetry bilaterally symmetrical
What happen when free-living flatworms are damagedcan regenerate, or grow new body parts	Adaptation for parasitic lifestyle hooks and suckers, reduced or no digestive system