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What are the three classes of Phylum Mollusca?
- Gastropoda
- Pelecypoda
- Cephalopoda
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Which class in phylum mollusca means stomach foot?
Gastropoda
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What are the examples of the class gastropoda?
Whelk, Conch, Abalone
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Which class in phylum mollusa means hatchet foot?
Pelecypoda
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What are the examples in class pelecypoda?
Mussles, shipworm, scallop, oysters
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Which class in phylum mollusa that means head-foot?
Cephalopoda
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What are the examples of class cephalopoda?
Octupus, Nautilus, Cuttlefish, Squid
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What are the key evolutionary advances of phylum Mollusca?
Eupuesocoel, and all major systems
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What is the main habitat of phylum mollsca?
Mainly aquatic and some land
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What are the body regions of phylum mollusca?
Head, Foot, Visceral Mass
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What variety of feeding methods are used in phylum mollusca?
Carnivores, herbonivores, saprotroph, filter feeders, parasites
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Do they have an open or closed circulatory system?
Open, besides Cephalopoda
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How does gas exchange take place in phylum mollusca?
Across the body along with lungs or gills
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What does the head/foot contain?
feeding, cephalic sensory and locomotor organs.
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What does the visceral mass contain?
the digestive, circulatory, resporatory, and reproductive organs.
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What is the rasping tongue like organ (not found in bivalves) A ribbon membrane covered with rows of tiny backwards-pointing teeth. Serves to scrape off food and provides a "conveyer belt" transport food toward the disgestive tract?
Radula
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What are the foot functions?
Movement, feeding (to capture prey) attachment reproduction.
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Where does most of the respiration take place at in Class Gastropoda?
through the mantle tissue or through the lungs or gills that have developed within the cavity itself
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What is the body plan of Class Gastropoda?
Univalve
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What has a single shell and it is their chief form of defense?
Univalve
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What is the harden mucous plug that prevents water lost
Operculum
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What is torison?
Twisting of the body organs in a 180 degrees direction
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What is the problem with torison create for the gastropoda and how is it solved.
No more fouling by the water current the wastes are carried away from the gills
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What happens before torison takes place?
Coiling
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What is right handed coiling called
Dextral
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What is left handed coiling called?
Sinistral
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Is their ganglia well developed?
YES
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What are the sensory organs in Class Gastropoda?
- Eyes at the base of each tentacle or simple photoreceptors (light and Dark)
- Staticysts
- tractile organs
- chemoreceptors
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what do statocysts help with?
gravity
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what do tactile organs help with ?
touch
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What do chemoreceptors help with
taste and smell
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What is the movement like in gastropoda's?
propelled by muscular perstalsis of foot and mucous secreated by gland cells
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What helps filtering out wastes from bodily fluids and excreting them via pores?
nephridia
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Are Gastropoda's deiocous or monoecious?
Deiocous usually, sex structures are on the head.
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What is a love dart in Gastropoda's?
Harden chiten grows with hormones and they stap partner in brain telling it to fertize the eggs. Other snail leaves and kills sperm.
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What class involves the hatchet food nickname
Class Pelecypoda
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What is another name for class pelecypoda?
bivalves
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What is a notch between the anterior and dorsal sides that is the oldest part of the shell.
Umbo
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How do pearls form?
They form when a piece of sand gets into the mantle and then the mantle cavity starts to bulid around it
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What removes unwanted particles in the gills?
Gill Palps
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How are the proteins and fats digested in class pelecypoda?
Interacellular
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How are carbs digested in class pelecypoda?
extracellular
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What is the crystalline style do in the digestive system?
- seperates proteins and fats from carbs.
- rolling the food mass and freeing digestive enzymes
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What type of circulatory system do the class pelecypoda have?
Open, three chambered heart. (2 auricles and 1 ventricle)
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What is the pattern of the blood flow in Class Pelecypoda?
Heart--arteries--Capillaries to sinus--veins (gills)
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What sensory organs do class pelecypoda have?
- Statocysts in the foot
- tactile cells
- pigment cells
- scallops have blue eyes
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How is sperm shed into the water by Class Pelecypoda?
Incurrent siphon
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What happens to the zygote development within the gills?
glochidia
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What needs to happen after glochidia are expelled into the water?
must find fish to parasitize
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Which class of mollucs mean head footed mollusks?
Cephalopoda
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What is the habitat of the class cephalopoda?
Marine, most prefer deep water
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What functions do the suckers serve in class cephalopoda?
On the arms/tenticles are good for catching food
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What are the foot functions?
Movement, feeding (to capture prey) attachment reproduction
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What is the body plan class gastropoda?
though the mantle tissue or through the lungs or gills that have developed within the cavity itself
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What is the body plan of clss gastrpoda ?
univalve
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What has a single shell and it is their chief form of defense?
univalve
-
What is the harden mucous plug that prevents water lost?
operculum
-
What is torison?
twisting of the body organs in a 180 degrees direction
-
What is the problem with torison create for the gastrpoda and how it is solved
No more fouling by the water current the wastes are carried away from the gills
-
What happens before torison takes place?
Coiling
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What is right handed coiling called?
Dextral
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What is left handed coiling
Sinstral
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Is their ganglia well developed?
yes
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What are teh sensory organs in class gastropoda?
- Eyes at the base of each tentacle or simple photoreceptors (light and dark)
- staticysts
- tractile organs
- chemoreceptors
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What do statocysts help with?
Gravity
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What do tactile organs help with?
touch
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what do chemorecptors help with?
taste and smell
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What is the movement like in gastropoda's?
Propelled by muscular perstalsis of foot and mucous secreated by gland cells
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What helps filtering out wastes from bodily fluids and excreting them via pores?
Nephridia
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Are gastropoda's deiocuous or monoecious?
Deiocous usually, sex structures are on the head
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what us a love dart in gastropodas?
Harden chiten grows with hormones and they stap partner in brain telling it to fertize the eggs. other snial leaves and kills sperm
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What class involves the hatchet food nickname?
Class Pelecypoda
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What is another name for class pelecypoda
bivalves
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What us a notch between the anterior and dorsal sides that is the oldest part of the shall
umbo
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How do pearls from?
The form when a piece of sand gets into the mantle and then the mantle cavity starts to bulid around it
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What removes unwanted particles in the gills?
Gill palps
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How are the proteins and fats digested in class pelecypoda?
intercellular
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How are carbs digested in class pelecypoda?
Extracellular
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What is the crystalline style do in the digestive system?
Seperates proteins and fats from carbs
Rolling the food mass and freeing digestive enzymes
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How do squids move?
By forcefully expelling water from the mantle cavity through a ventral funnel that be pointed to control direction
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What is a common word for Phylum Annelida
Segmented worms
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What does Annelid literal meaning?
Little rings
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What are the examples in phylum Annelida
Earthworms leeach and polychaete
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What is the key evoultionary advancement in phlyum Annelida?
Metamerism (segmenation)
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What is the signifance of metamerism for annelids?
- Movement
- Redunacy
- Advanced nervous system
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What is the habitat for phylum annelida
Mostly Marine 2/3, and 1/3 fresh water
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What is the embryonic development of phylum annelida?
Eucoelomates with protostome development
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What are the three classes of Phylum Annelida?
- Polychaeta
- Hirudinea
- Hirudinea
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What is the general description of class polychaeta?
Many bristles
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What is the habitat of class polycheata ?
marine
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What are examples of class polucheata ?
featherworms bristlesworms
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What is the general discripton of class hirudinrea ?
No brisles
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What is the habitat of class hirudinea?
Freshwater
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What are examples of class hirudinea?
Leeches
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What is the general discription of Class oligochaeta?
Few Bristles
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What is the habitat of class oliochaeta?
Teristal and freshwater
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What are examples od class oligochaeata?
Earthworms
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