Jeopardy

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These worms are found in fresh and salt water but not on land.

Flatworms

Flatworms have this type of body cavity.

Acoelomate

Flatworms have this many openings for ingesting food and removing waste.

1

If you shine a flashlight on the Planaria you would notice that they would actively move out of the light because these structures were able to sense the change.

Eyespots

When Planaria is cut in half they will most likely survive and undergo this process.

Regeneration

The phylum Nematoda is mostly made up of these types of organisms.

Parasites

Roundworms have a digestive system with this many openings.

2

Roundworms have this type of body plan.

Pseudocoelomate

This is how a roundworm carries out respiration.

Diffusion through the skin

This is the phylum of roundworms.

Nematoda

Waste products leave the earthworm’s body through this.

Anus

Worms in the annelida phylum have a body plan that is this.

segmented

The earthworm uses these structures to assist their movement because they provide them grip much like tires.

Setae

This structure stores food that the earthworm consumes.

Crop

An earthworm breathes through this.

Its skin

Because Bobby is suffering from severe irritation near his anus after playing in the sandbox yesterday, his doctor diagnoses him with this parasite.

Pinworm

This common acoelomate flatworm can grow to enormous lengths in the human intestine and has been claimed to be used in some people’s diets.

Tapeworm

Biff loves his pork chops and mashed potatoes, but lately he has been suffering from severe abdominal pain and diarrhea, so his doctor has diagnosed him suffering from this worm.

Trichinella

Herb, a hiking enthusiast, recently decided to trek barefoot through a forest and ever since has been complaining of severe abdominal pain and cramps. His doctor prescribed him an iron supplement to help treat the infection of this worm.

Hookworm

The city Ty just visited on vacation was not very clean and allowed human feces to be thrown in the fields and in the streets. Now he is suffering from intense abdominal pain, vomiting, and restlessness because he has probably contracted this parasitic worm.

Ascaris

This organ in the earthworm breaks down food before it enters the intestine.

Gizzard

These structures excrete metabolic waste through the skin of the earthworm.

Nephridia

Nutrient absorption of food takes place in this structure of the earthworm.

Intestine

This earthworm structure secretes a slime layer to receive eggs and sperm and form a “cocoon”.

Clitellum

The concentration of nerve fibers located at the anterior end of the worm are known as this.

Cerebral Ganglion

Roundworms reproduce this way.

Sexual

Earthworms have this body plan.

Coelomate

The earthworm has this many hearts.

5

The lighter side of the worm that contains the mouth is this side.

Ventral

Flatworms were the first species to show this, which means a concentration of nerves in one location.

Cephalization

Readers Digest

These are the differences between the flatworm, roundworm, and segmented worm’s digestive system. (compare them)