Phylum Plathelminthes has how many classes & what are they?
4; Turbellaira, Trematoda, Cestoda, Monogenea
Which phylum is known as flat worms and which are known as ribbion worms?
List 3 differences of Phylum Nemertea compared to Phylum Plathelminthes:
1. presence of probiscis
2. complete digestive tract
3. blood vascular sys.
For the following parasites name methods likely to prevent/control them:
a. Clonorchis (liver Fluke)
b. Schistosoma (blood fluke)
c. Taenia (beef tapeworm)
e. Wuchereia (filarial worms)
g. Cercaria (trematoda)
a: fully cooking food & treating sewage
b: treating sewage
c: fully cooking food & treating sewage
d: treating sewage
e: sprayong insectaside
f: fully cooking meat
g: fully cooking meat
all classes except one that belong to the Phylum Plathelminthes are parasitic. Name which are parasitic.
Trematoda, Cestoda, Monogenea
In Trematodas Who are intermediate hosts & who are definitive hosts?
definative= vertebrate (humans)
List 4 characteristics of the Phylum Plathelminthes:
pharynx for ingesting food
digestion/absorbtion of food in intestine & diverticula
longitudinal nerve cords & cerebral ganglia
In Cestodas who are the intermediate & definative hosts?
intermediate= sheep, humans
Why are sensory sys better developed in Planarians than flukes & tapeworms?
b/c they're free-living
What do Monogeneas use for attatchment?
What do Cestodas use for attatchment?
Outter Covering of a nematode assisting in movment is ?
This worm emerges from large intestine at night to lay eggs on the skin around anus ?
Parasitic juvenilles burst out of host after host is near water ?
What are two characteristics of Rotifers? How do they reproduce?
parthogenesis by amictic females (asexual)
sexually by mictic females
No digestive tract, intermediate host is arthropods, & endoparasitic in gut of vertebrate describes what Minor lophotrochozoan?
Aquatic, colonial creatures made of zooids, that are tiny filter feeders who have a lophophore and includs bryozoans describes what Minor Lophotorochozoan?
Lamp shells are marine benthic creatures with 2 valves (dorsal & Ventral), this describes what Minor Lophotorchozoan Phylum?
List 4 characteristics of Molluscs.
open circulatory sys
What are the 7 Classes of Molluscs? (M.P.S.C.Cs.B.G.)
What class of Molluscs have calcareous scales & ancestral body form?
Class Caudofoveata & Solenogastres
Tusk shell deposite feeders who burrow in substrae describes what Class of Molluscs?
List 4 characteristics of the Mollusca Class Bivalvia.
sedentary filter feeders
water circulated over gills via siphon & cilia
labial palps transfer food to mouth
crystalin style in stomach
Waht are Glonchidia larve and what do they do?
They are Bivalvia which attatch to gills of fish for several weeks
torsion, coiling & drilling holes in bivalves are characteristic of what class of Molluscs?
What are the 3 types of Gastropods?
Prosobranchs, Opisthobranchs, & Pulmonates
What are Cerata & Rhinophore? These are characteristic of what?
Cerata: another type of gill
Rhinophore: Posterior pair tentacles
Opisthobranchs, Class Gastropod
what replaces gills in Pulmonates? What are Pulmonates? How many tentacles do they have?
lung, a type of gastropod, 1-2 pair
Where is venom produced in Cephalopods?
What is the function of the mantle in cehpalopods?
pump water over gills
What kind of circulatory sys do cephalopods have?
Whats the difference between an open and closed circulatory sys?
Open: blood is distributed directly to organs
Closed: blood is in vessels & travels through different arteries & veins
How does blood circulate in cephalopods?
Branchial hearts to
gills (O2 Pick up) to
systematic heart to
Body (O2 Drop off)
back to Branchial Hearts
What is hemoglobin? What Class of Molluscs have hemoglobin?
Hemoglobin: respritory pigment that carries oxygen
Cephalopds have Hemoglobin
How does axon diameter correlate to speed of nervous sys?
the bigger the diameter the faster the speed due to increased surface area
How do Cephalopds communicate?
What are Chromatophores?
How is a spermatophore transfered to a female Cephalopod?
Hectocotylus: specialized arm
Summarize the body form of Molluscs.
mantle, foot, shell
Explain how lophophorates feed.
Lophophore: ciliated crown of tentacles which capture food & creat a current toward the mouth which is located in the bottom center of all the tentacles
Explain the feeding biology of typical bivalves.
small organic material is captured on the gills and moved toward the mouth by the cilia on the gills, then the labial palps transfer food from the gills to the mouth
Summarize reporductive cycle of clams.
eggs fertilize in tubes when sperm is brought in by incurrent, they then develope into glonchidia larve at which point to becme free swimming and attatch to fish
Explain how anatomy of Cephalopods is adapted for their active life style.
They have chromatophores which are pigment cells. These chromatphores allows cephalopods to change colors and blend in seemlessly with any background. This allows them to hide from predators and also to disguise themselves from prey.
Contrast complete digestive system to gastrovascular system.
IN a complete digestive system there is an anus which makes the organism more efficient b/c it ingestion and defication can occur at the same time
Where as, in a gastrovascular system the waste must exit via the mouth.
Compare and contrast Acoelomate, Coelomate, & Pseudocoelomate body cavities.
Acoelomate: don't have a Coelom, which is a cavity that forms entirely within the mesoderm.
Coelomate: has a fluid filled Coelom completely surrounded by mesoderm.