Worms🪱 Flashcards
The coelom is known as the…
Body Cavity
What type of symmetry are Cnidarians?
Radial
What type of symmetry are Platyhelminthes?
Bilateral
What type of symmetry are sponges?
Asymmetrical
Platyhelminthes have a vermiform which means they have a/an…
Worm-like shape
The ganglia located in species of Platyhelminthes is a clump of…
Nerves
Trichinellas are…
Pseudocoelomate
Tapeworms are…
Acoelomate
Bristleworms are…
Coelomate
Invertebrates _____ have a backbone, where as vertebrates __ have a backbone.
Don’t, do
The order in which food/nutrients gets passed through an annelid is…
Mouth, pharynx, esophagus, crop, gizzard, intestine, anus
_____ worms are transparent, streamlined, with fish-like fins and a tail.
Arrow worms
The tapeworm has several ___________ that contain both the male and female reproductive organs.
Proglottids
Arrow Worms
Most common plankton
Beard Worm
No gut, mouth or anus
Cestoda
Tapeworms
Elephantiasis
Accumulation of watery fluid in tissues
Heartworm
Mainly in dogs, transported by mosquitos
Hirundea
Leeches
Nematoda
Round worms
Nemertea
Ribbon worms
Oligochaeta
Earthworms
Peanut worm
Have granules over body
Pinworms
Perianal itching, highly contagious
Polychaeta
Bristleworms
Trematoda
Flukes
Trichinosis
Disease caused by eating raw meat infected with larvae
Turbellaria
Planarians
What structures arise for the Endoderm, Ectoderm and Mesoderm layers?
Endoderm- Growth of structures, lining of the gut, lining of digestive tract
Ectoderm- Production of sensory system and surface skin
Mesoderm- Build muscular, excretory and reproductive systems
Planaians have an incomplete digestive system. What does that mean?
They have one opening that serves as both the mouth and the anus.
How is a Planarian’s ability to regenerate different than the regeneration process of a sea star?
When Planarians are cut in half, their head can grow a tail and their tail can grow a head. If sea stars are cut in half, most will die. Sea stars only regenerate lose arms.
Explain the life cycle of a fluke and label the primary host, 1st intermediate host and 2nd intermediate host.
Human (primary host) ingests raw infected fish. The fluke travels through the digestive system and makes its home in the intestines, producing eggs. These eggs are excreted as feces, and this feces is ingested by the snail or a similar creature (the 1st intermediate host). The larvae will grow and burrow out of the 1st intermediate host, and look like a tasty snack for an unsuspecting fish (the 2nd intermediate host). Then the cycle will begin again.
Explain how the nemertea capture their prey.
They rapidly extend a reversible proboscis to wrap around and immobilize their prey, followed by the injection of toxins
Why are pinworms so contagious?
Pinworms are so contagious because they are transmitted by children. Children scratch their butts, and the worms then get into these Children’s hands. Because they don’t frequently wash their hands, the worms can travel to other children or to families and so forth.
Why are worms in the phylum Echiura known as innkeepers?
They are known as innkeepers because they offer their burrows to any creature to live with them simultaneously.
How are Platyhelminthes and Cnidarians different according to their tissue content?
Cnidarians have two tissue layers and Platyhelminthes have three.
How do earthworms enrich and aerate soil?
When earthworms burrow they aerate the soil, and when they poop they enrich the soil.
Parts of symmetry–>
Oral- side of mouth on jellyfish; Aboral- non-mouth side of jellyfish. Dorsal- top; Ventral- bottom; Anterior- head/front; Posterior- backside/behind
Parts of a planarian–>
Auricle- weird flap looking things on the side; Brain- center of head; Eyespot- eye looking things; Pharynx- center of body
Younger segments are further ______ and older segments are further _______.
Forward, back
Parts of a tapeworm–>
Top hair looking things- hooks; circular looking things- suckers; top portion- scolex
