BIO

Bilateral Symmetry

Body can be divided into two equal halves (left and right).

Planaria

A free-living flatworm often used in labs.

Pharynx

A tube-like feeding structure used to suck in food.

Flame Cell

Cell that removes waste and controls water balance.

Eyespot

Light-sensitive structure that helps detect light.

Regeneration

Ability to regrow lost body parts.

Parasite

Organism that lives on or inside another organism and benefits.

Host

Organism that a parasite lives on or in.

GVC

Gastrovascular cavity; digests and distributes food.

Fluke

A parasitic flatworm.

Tapeworm

A long parasitic flatworm that lives in intestines.

Scolex

The head of a tapeworm with hooks/suckers for attachment.

Proglottid

Body segments of a tapeworm that contain eggs.

Head

Front of body.

Eyespots

Detect light.

Ventral

Bottom side.

Posterior

Back end.

Anterior

Front end.

Pharynx

Feeding tube in middle of body.

GVC

Digests and spreads nutrients.

Suckers

Help attach to host intestine.

Proglottids

Segments that contain eggs.

Anus

Opening where waste leaves the body.

One-Way Digestion

Food moves in one direction: mouth → intestine → anus.

Cuticle

Tough outer covering that protects roundworms.

Vinegar Eel

A tiny free-living roundworm found in vinegar.

Ascaris

Large intestinal roundworm spread by contaminated food or water.

Hookworm

Roundworm that enters through skin, often from contaminated soil.

Trichinella/Trichina

Roundworm found in undercooked pork.

Trichinosis

Disease caused by eating Trichinella in undercooked meat.

Pinworm

Common intestinal worm spread by eggs on hands or objects.

Filaria

Parasitic worm spread by mosquitoes.

Elephantiasis

Disease caused by filaria that causes severe swelling.

Guinea Worm

Parasitic worm spread by drinking contaminated water.

Mouth

Takes in food.

Intestine

Digests food.

Anus

Removes waste.

Anterior

Front end.

Posterior

Back end.