Flatworms, Roundworms, and Rotifers

Flatworms, roundworms, and rotifers have _____

• bilateral symmetry

• radial symmetry

• no symmetry (asymmetry)

A(n) _____ is a tube-like muscular organ that free-living flatworms extend out of their mouths and use to feed.

• pharynx

• cuticle

• ganglion

• mastax

• eyespot

Planarians can reproduce asexually by ______-two new planarians grow from two halves of planarians or another piece of a planarian

• regeneration

• parthenogenesis

• budding

• mitosis

• binary fission

Unlike sponges and cnidarians, flatworms have a(n) _____system consisting of a network of small tubes with bulblike flame cells on side branches of the tubes

• excretory

• circulatory

• respiratory

• digestive

• nervous

Flatworms have an excretory system consisting of a network of small tubes with bulblike ______ on side branches of the tubes that move water and excretory substances out of the body

• flame cells

• ganglia

• pharynxes

• eyespots

• proglottids

______ flatworms eat dead or slow-moving organsims whereas _____ flatworks eat blood and tissues of a host

• free-living; parasitic

• parasitic; free-living

• autotrophic; heterotrophic

• heterotrophic; autotrophic

Match the following

• parasitic flatworms that infect the blood or body organs of their host

• cestodes (tapeworms)

• parasitic flatworms that live in water, moist soil, and the intestinal tract of their host

• turbellarians (planarians)

• free-living flatworms

• trematodes (flukes)

Planarians are _____ flatworms whereas flukes and tapeworms are _____

• free-living; parasitic

• parasitic; free-living

• autotrophic; heterotrophic

• heterotrophic; autotrophic

_____ have feeding structures called hooks and suckers

• tapeworms

• hookworms

• flukes

• pinworms

• planarians

Match the following

• flatworms

• Rotifers

• "wheel-bearing" worms

• Nematoda

• roundworms

• Platyhelminthes