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Mollusca toncheva laska mina 10 7

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Information about Mollusca toncheva laska mina 10 7

Published on April 15, 2010

Author: MrJewett

Source: slideshare.net

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Mollusca Phylum Octopuses, snails, squids and many others…

General Mollusca – from the Latin mollis – soft; Symmetry – bilateral (like humans); Taxonomy: - appeared 542 to 488.3 MYA; - most closely related to arthropods, but more inferior than them; - shared common ancestor with people around 550 MYA;

Mollusca – from the Latin mollis – soft;

Symmetry – bilateral (like humans);

Taxonomy: - appeared 542 to 488.3 MYA;

- most closely related to arthropods, but more inferior than them;

- shared common ancestor with people around 550 MYA;

 

Unique characteristics soft body usually protected by external calcium-containing skeleton (shell); 3 distinct body parts: head-foot ( sensory & motor organs) ; visceral mass ( organs of digestion, excretion and reproduction); mantle (specialized tissue that secrets the shell and holds the body of the organism together) [+ mantel cavity ( houses the gills)]; radula – toothed tongue; for digestion and sometimes for protection; at least two main nerve cords (3 in bivavlves );

soft body usually protected by external calcium-containing skeleton (shell);

3 distinct body parts: head-foot ( sensory & motor organs) ; visceral mass ( organs of digestion, excretion and reproduction); mantle (specialized tissue that secrets the shell and holds the body of the organism together) [+ mantel cavity ( houses the gills)];

radula – toothed tongue; for digestion and sometimes for protection;

at least two main nerve cords (3 in bivavlves );

Reproduction Most reproduce externally, but those that are more complex – internally; Hermaphrodites or dioecious (one individual is male, the other female); Releasing of eggs and external fertilization; eggs -> larvae;

Most reproduce externally, but those that are more complex – internally;

Hermaphrodites or dioecious (one individual is male, the other female);

Releasing of eggs and external fertilization;

eggs -> larvae;

Locomotion & Nervous System Locomotion - move with the help of a muscle on their down part of the body. This “foot” has a pair of statocysts and it secrets mucus . Nervous System – have two nervous cords – the visceral and the pedal ones.

Locomotion - move with the help of a muscle on their down part of the body. This “foot” has a pair of statocysts and it secrets mucus .

Nervous System – have two nervous cords – the visceral and the pedal ones.

Representatives Blue Mussels ( Mytilus edulis ) – class Bivalvia; Grove snail ( Cepaea nemoralis) – class Gastropods; Broadclub Cuttlefish (Sepia latimanus) - class Cephalopoda

Blue Mussels ( Mytilus edulis ) – class Bivalvia;

Grove snail ( Cepaea nemoralis) – class Gastropods;

Broadclub Cuttlefish (Sepia latimanus) - class Cephalopoda

Human Interactions used for food; production of medicaments and drugs; pearls, shells – valuable items; sometimes they bite people and sometime the venom is so poisonous that the person dies;

used for food;

production of medicaments and drugs;

pearls, shells – valuable items;

sometimes they bite people and sometime the venom is so poisonous that the person dies;

Fun Facts • Octopi Ø They have three hearts Ø Their blood is light blue, just like aristocrats J Ø They have 80 tentacles, each of which has 240 sucking cups (a total of 1920) used for catching their victim. Ø Just like sea stars, if their arm is cut, they can regenerate it • Slugs Ø They have four noses Ø A disgusting fact: sometimes right before mating slugs each other’s slime • Snails Ø Snails have the ability to slide on the edge of a blade and still not get hurt Ø If a person hums quietly to a snail for a little bit of time, the animal will come out of its shell.

• Octopi

Ø They have three hearts

Ø Their blood is light blue, just like aristocrats J

Ø They have 80 tentacles, each of which has 240 sucking cups (a total of 1920) used for catching their victim.

Ø Just like sea stars, if their arm is cut, they can regenerate it

• Slugs

Ø They have four noses

Ø A disgusting fact: sometimes right before mating slugs each other’s slime

• Snails

Ø Snails have the ability to slide on the edge of a blade and still not get hurt

Ø If a person hums quietly to a snail for a little bit of time, the animal will come out of its shell.

Works Cited &quot;Phylum Mollusca: Molluscs&quot;. 30.03.2010 http://infusion.allconet.org/webquest/PhylumMollusca.html Driscoll, Barbara. &quot;Mollusks [Mollusca]&quot;. Great Bay Estuary. 30.03.2010 http:// www.armofthesea.info/flora_fauna/ff_speciespp/moll.htm &quot;Body Symmetry of Mollusca&quot;. Forces of Nature. 30.03.2010 http://www.forces-of-nature.net/topics/molluscum/Body_Symmetry_Of_Mollusca.htm &quot;Mollusca Reproduction&quot;. Forces of Nature. 30.03.2010 http://www.forces-of-nature.net/topics/molluscum/Mollusca_Reproduction.htm &quot;Life Cycle of a Sail&quot;. Snail World. 30.03.2010 http://www.snail-world.com/Life-Cycle-of-a-Snail.html A.Pihlainen, &quot;Octopus Fun Facts&quot;. 30.03.2010 http://ellerbruch.nmu.edu/classes/cs255w04/cs255students/apihlain/P5/P5.html &quot;Fun Facts on Slugs&quot;. Stumblerz. 30.03.2010 http://www.stumblerz.com/fun-facts-on-slugs/ &quot;Interesting Facts about Snails&quot;. Zephyrus. 30.03.2010 http://www.zephyrus.co.uk/interestingfactssnails.html &quot;Mollusca&quot;. Wikipedia® . 30.03.2010 <http://en.wikipedia.org/wiki/Mollusca>.

&quot;Phylum Mollusca: Molluscs&quot;. 30.03.2010 http://infusion.allconet.org/webquest/PhylumMollusca.html

Driscoll, Barbara. &quot;Mollusks [Mollusca]&quot;. Great Bay Estuary. 30.03.2010 http:// www.armofthesea.info/flora_fauna/ff_speciespp/moll.htm

&quot;Body Symmetry of Mollusca&quot;. Forces of Nature. 30.03.2010 http://www.forces-of-nature.net/topics/molluscum/Body_Symmetry_Of_Mollusca.htm

&quot;Mollusca Reproduction&quot;. Forces of Nature. 30.03.2010 http://www.forces-of-nature.net/topics/molluscum/Mollusca_Reproduction.htm

&quot;Life Cycle of a Sail&quot;. Snail World. 30.03.2010 http://www.snail-world.com/Life-Cycle-of-a-Snail.html

A.Pihlainen, &quot;Octopus Fun Facts&quot;. 30.03.2010 http://ellerbruch.nmu.edu/classes/cs255w04/cs255students/apihlain/P5/P5.html

&quot;Fun Facts on Slugs&quot;. Stumblerz. 30.03.2010 http://www.stumblerz.com/fun-facts-on-slugs/

&quot;Interesting Facts about Snails&quot;. Zephyrus. 30.03.2010 http://www.zephyrus.co.uk/interestingfactssnails.html

&quot;Mollusca&quot;. Wikipedia® . 30.03.2010 <http://en.wikipedia.org/wiki/Mollusca>.

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