Test 6- Unsegmented Worms Flashcards
Are part of phylum __
Platyhelimenthes
They are ____ meaning ___
No body cavity
They live in ___ and ___
Salt and freshwater
There is __ species known
14,500
They are ___ symmetry
Bilateral symmetry
They have __ nervous system with ____ at head end
Bilateral, cephilization
Species exhibit __ sensitive to light
Eyespot
Some posses a ____ cavity and primitive ___ systems
Gastro vascular
Organs
Do not have ___ or _ systemic
Circulatory
Respiratory
Respire thru __
*through body surface
Diffusion
They are ___
Hermaphroditic
Planaria are aka as____
Free living flatworms
Planaria move by beating __ and ___ on ____
Beating cilia and gliding on a film of mucus
Planaria are __ to __ in size
3-12mm
Planaria have a ___ opening to their stomachs in the middle of their body
Single
Eyespots are aka as ___
Ocelli
Planaria posses __ eyespots that are sensitive to light
2
Planaria are ____
*__vores
Carnivores
Planaria reproduce ____ and is capable of regeneration
Asexually
They feed on __ or ___ moving organism
Dead, slow moving
Pharynx is a ___
Tube like muscular organ that a planarian extends from its mouth to feet
Enzymes digest the food ___ the animals body
Outside
Cells lining the digestive tract obtain food by __ and __
Diffusion and phagocytosis
Osmosis is ___
Diffusion of H2O
Animal cels have a high ___ compared to freshwater organisms
Solute
Planaria’s ____ system pumps out excess into the ___
Excretory
Environment
During sexual reproduction flatworms exchange ____
Sperms
Zygotes are released into the ___ to hatch
Water
Planarians can reproduce asexually ____ pieces
Regenerating.
What are the 2 types of tape worms
Pork tapeworm (taenia solium)
Beef tapeworm (taenia saginata)
Give 2 characteristic of pork tape worms
Insects pig and humans
Flat and long which maximize the absorption of nutrients from host
Give 2 symptoms of beef tapeworms
Diarrhea
Lost of appetite
Roundworms have _____ which help them have a complete ___ way digestive tract
Pseudo coelomate
One
In round worms the sexes are ___
Dioecious
In round worms bodies are ___
Unsegmented
In roundworms the epidermis secretes a cuticle made outta ___ to keep it from drying out
Collagen
Roundworms contain many ___ and ___ forms/species
Parasitic
Free living
Round worms are phylum ___
Nematoda
Nematodes ecological roles includ
*2
Decomposers
Important to the chain of energy production and matter recycling of the earth
Negative effects of parasitic nematodes *2
Causes crop death
Invade intestine of many animals leading to sickness
Name 2 types of nematodes and where they infect
Whipworms- human large intestines causing trichinosis
Hookworms- invade small intestine of dogs, cats, and human sucking blood viciously
