Mollusca yova 10 6

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Information about Mollusca yova 10 6

Published on April 15, 2010

Author: MrJewett

Source: slideshare.net

Mollusca Organisms Mila Cherneva Yova Kemenchedjieva Ivan Mukov 10/6 http:// tolweb.org/tree/ToLimages/loligo.250.gif http://tolweb.org/tree/ToLimages/lunatia.250.gif

Who are they? Organisms from the Phylum Mollusca About 100, 000 different varieties that can be found both in water and inlands [7] Mollis = soft (from Latin) [3] Bilateral symmetrical [7]

Organisms from the Phylum Mollusca

About 100, 000 different varieties that can be found both in water and inlands [7]

Mollis = soft (from Latin) [3]

Bilateral symmetrical [7]

Mollusca as a Part of the Cladogram Place in the evolutionary tree (13) Domain – Eukaryotic Kingdom – Metazoan (animals) Group of phyla - Bilateria Subgroup of phyla – Lophotrochozoa Phylum – Mollusca Arthropods (insects and spiders) - same group of phyla as Mollusca. Humans and Mollusca belong to the Bilateria group of phyla. (13)

Place in the evolutionary tree (13)

Domain – Eukaryotic

Kingdom – Metazoan (animals)

Group of phyla - Bilateria

Subgroup of phyla – Lophotrochozoa

Phylum – Mollusca

Arthropods (insects and spiders) - same group of phyla as Mollusca.

Humans and Mollusca belong to the Bilateria group of phyla. (13)

What is unique about them? As their name points out, often have soft body within a hard calcareous shell (7) Shell formed from secretions of mantle (3) Mantle cavity – formed by folds of mantle (3) Statocyst - balance organ incorporated in the foot structure (3)

As their name points out, often have soft body within a hard calcareous shell (7)

Shell formed from secretions of mantle (3)

Mantle cavity – formed by folds of mantle (3)

Statocyst - balance organ incorporated in the foot structure (3)

Representatives of the Mollusca Phylum http://www.naturfoto-cz.de/photos/others/roman-snail-21973.jpg

Clams/Bivalva Both in fresh and salt water (2) I nhabit coastal waters from Florida to the Gulf of St. Lawrence , along the Gulf of Mexico to the Yucatan Peninsula , South Carolina (2) Filter feeders eating plankton (13) Locomotion (2) A bivalve closes its shells by contracting its powerful adductor muscles Foot used for burrowing

Both in fresh and salt water (2)

I nhabit coastal waters from Florida to the Gulf of St. Lawrence , along the Gulf of Mexico to the Yucatan Peninsula , South Carolina (2)

Filter feeders eating plankton (13)

Locomotion (2)

A bivalve closes its shells by contracting its powerful adductor muscles

Foot used for burrowing

Clams’ Life and Role Two stages of the life cycle: larva stage - The oldest part of the clam shell is the umbo, and it is from the hinge area that the clam extends as it grows. At some point a shell and a foot develop Reproduction stage – spawning process Glochidia , larva in fresh water, can be serious pests of freshwater fish (6)

Two stages of the life cycle:

larva stage - The oldest part of the clam shell is the umbo, and it is from the hinge area that the clam extends as it grows. At some point a shell and a foot develop

Reproduction stage – spawning process

Glochidia , larva in fresh water, can be serious pests of freshwater fish (6)

Octopus Latin Name: Octopus vulgaris (9) Found in the world’s temperate oceans in warm weathers - near Britain (1) along the northern Pacific coasts from the Sea of Japan east to Alaska and south to California (9) Ranging in size from a just few centimeters to even a few meters (9) Feeds mainly on crabs, lobsters, crayfish and other molluscs (9) Move by crawling/ swimming; may use their arms Ex.: walk on two of them http://www.ypte.org.uk/UserFiles/Image/Factsheet%20images/animal_facs/Animals%20-%20O/commonoctopus.jpg

Latin Name: Octopus vulgaris (9)

Found in the world’s temperate oceans

in warm weathers - near Britain (1)

along the northern Pacific coasts from the Sea of Japan east to Alaska and south to California (9)

Ranging in size from a just few centimeters to even a few meters (9)

Feeds mainly on crabs, lobsters, crayfish and other molluscs (9)

Move by crawling/ swimming; may use their arms

Ex.: walk on two of them

Octopus’s Life Cycle Female lays the eggs; takes care of them for 2-3 months (8) Eggs hatch – larvae that looks like tiny octopuses (9) Flow as plankton in the sea (9) After a life of about 2-3 years, male die after they’ve fertilized eggs (8) Females die after egg is hatched (8)

Female lays the eggs; takes care of them for 2-3 months (8)

Eggs hatch – larvae that looks like tiny octopuses (9)

Flow as plankton in the sea (9)

After a life of about 2-3 years, male die after they’ve fertilized eggs (8)

Females die after egg is hatched (8)

Snails… Most gastropods have : spirally coiled shell into which the body can be withdrawn Land snail, freshwater snail and marine snail ( majority of snail species ) Live almost everywhere including ditc hes and deserts. Eat primarily dying plant s or fruits and living plants . Freshwater snails eat remains of dead animals and plants . [10, 6 ] Locomotion Snails have a muscular foot which is used for "creeping“ , swimming or burrowing As it moves, the snail releases a slippery slime which makes the movement easier

Most gastropods have :

spirally coiled shell into which the body can be withdrawn

Land snail, freshwater snail and marine snail ( majority of snail species )

Live almost everywhere including ditc hes and deserts.

Eat primarily dying plant s or fruits and living plants .

Freshwater snails eat remains of dead animals and plants . [10, 6 ]

Locomotion

Snails have a muscular foot which is used for "creeping“ , swimming or burrowing

As it moves, the snail releases a slippery slime which makes the movement easier

… Snails… Digestion Radulas - hard, ribbonlike organs that look like tongues. They contain rows of tiny teeth. These rows of teeth are replaced overtime. The food forms a string of food particles. The string is then rolled on the prostyle which is a cone like part that is rotated. The food is sorted and goes to the stomach. http://sarah-n-dipitous.typepad.com/photos/uncategorized/2007/10/01/snail_moving.jpg

Digestion

Radulas - hard, ribbonlike organs that look like tongues. They contain rows of tiny teeth. These rows of teeth are replaced overtime.

The food forms a string of food particles.

The string is then rolled on the prostyle which is a cone like part that is rotated.

The food is sorted and goes to the stomach.

… Snails Ecological role S nails and other mollusca are vital to healthy ecosystems. Freshwater snails - food for fish ; recyclers of plant and animal waste . [4] Life cycle Snails can be both hermaphrodites or have sexes. All snails lay eggs. Initially snails do not have shells. Over time the skin (mantle) releases liquid that gradually hardens and forms shell . The size of the shell is a sign for the age of the snail. (6)

Ecological role

S nails and other mollusca are vital to healthy ecosystems.

Freshwater snails - food for fish ; recyclers of plant and animal waste . [4]

Life cycle

Snails can be both hermaphrodites or have sexes. All snails lay eggs.

Initially snails do not have shells. Over time the skin (mantle) releases liquid that gradually hardens and forms shell .

The size of the shell is a sign for the age of the snail. (6)

Men and Molluscs We eat Mussel and oyster beds, clam-flats and other abundant shellfish The oldest form of money known is that of the seashell. Shells have been ground up for use in potions Man has long been inspired by the graceful symmetry and beauty of shells. Dyes made from molluscs were used to beautify clothing and other items made from cloth. Shells have had an indirect influence in advancing on Industry The collection and study of shells, whether by amateurs or professionals, is called Conchology . [3]

We eat Mussel and oyster beds, clam-flats and other abundant shellfish

The oldest form of money known is that of the seashell.

Shells have been ground up for use in potions

Man has long been inspired by the graceful symmetry and beauty of shells.

Dyes made from molluscs were used to beautify clothing and other items made from cloth.

Shells have had an indirect influence in advancing on Industry

The collection and study of shells, whether by amateurs or professionals, is called Conchology . [3]

Guggenheim Museum http://www.artlex.com/ArtLex/m/images/ museum_wrigh.gugg.2.lg.jpg

Octopuses are fun! If an octopus loses one of its eight arms, it grows a new one in its place ! An octopus has three hearts . Amazing! (7) http://vector4free.com/_images /vectors/normal/5.png

If an octopus loses one of its eight arms, it grows a new one in its place !

An octopus has three hearts . Amazing! (7)

Works Cited Work Cited: A-Z Animals. &quot;Octopus.&quot; A-Z Animals . N.p., 2009. Web. 28 Mar. 2010.      <http://a-z-animals.com/animals/octopus/>. Allegany County Public Schools. &quot;Phylum Mollusca: Mollusks .&quot; Allegany County       Public Schools . N.p., n.d. Web. 28 Mar. 2010. <http://infusion.allconet.org/webquest/PhylumMollusca.html>. Bourquin, Avril, and Ross Mayhew. &quot;Elegant Margin Shell.&quot; Man and Mollusc . N.p.,      Dec. 1999. Web. 28 Mar. 2010. <http://www.manandmollusc.net/      advanced_uses/man_and_mollusc.html>. Buzzle.com. &quot;Phylum Mollusca Characteristics.&quot; Buzzle . N.p., 2010. Web. 28 Mar.      2010. <http://www.buzzle.com/articles/      phylum-mollusca-characteristics.html>. Christine, E. &quot;The Global Decline of Mollusks.&quot; Actionbioscience . N.p., Apr.      2008. Web. 28 Mar. 2010. <http://www.actionbioscience.org/biodiversity/      parent.html>. Derek Kellogg and Daphne G. Fautin.”Class Bivalvia”. 26 January 2001. March 28, 2010. <http://animaldiversity.ummz.umich.edu/site/accounts/information/Bivalvia.html>

Work Cited:

A-Z Animals. &quot;Octopus.&quot; A-Z Animals . N.p., 2009. Web. 28 Mar. 2010.      <http://a-z-animals.com/animals/octopus/>.

Allegany County Public Schools. &quot;Phylum Mollusca: Mollusks .&quot; Allegany County       Public Schools . N.p., n.d. Web. 28 Mar. 2010. <http://infusion.allconet.org/webquest/PhylumMollusca.html>.

Bourquin, Avril, and Ross Mayhew. &quot;Elegant Margin Shell.&quot; Man and Mollusc . N.p.,      Dec. 1999. Web. 28 Mar. 2010. <http://www.manandmollusc.net/      advanced_uses/man_and_mollusc.html>.

Buzzle.com. &quot;Phylum Mollusca Characteristics.&quot; Buzzle . N.p., 2010. Web. 28 Mar.      2010. <http://www.buzzle.com/articles/      phylum-mollusca-characteristics.html>.

Christine, E. &quot;The Global Decline of Mollusks.&quot; Actionbioscience . N.p., Apr.      2008. Web. 28 Mar. 2010. <http://www.actionbioscience.org/biodiversity/      parent.html>.

Derek Kellogg and Daphne G. Fautin.”Class Bivalvia”. 26 January 2001. March 28, 2010. <http://animaldiversity.ummz.umich.edu/site/accounts/information/Bivalvia.html>

Work Cited 7. HowStuffWorks, Inc. &quot;Mollusk.&quot; HowStuffWorks . N.p., 2010. Web. 28 Mar. 2010.      <http://animals.howstuffworks.com/marine-life/mollusk-info.htm>. 8. HowStuffWorks, Inc. &quot;Snail.&quot; HowStuffWorks . N.p., 2010. Web. 28 Mar. 2010.      <http://animals.howstuffworks.com/marine-life/snail-info.htm>. 9. Forces of Nature. &quot;Characteristics Of Mollusca.&quot; Forces of Nature . N.p., 2010.      Web. 28 Mar. 2010. <http://www.forces-of-nature.net/topics/molluscum/      Characteristics_Of_Mollusca_2.htm>. 10. Life on the Rocky Shore. &quot;Octopus.&quot; Giant Pacific Octopus . N.p., Oct. 2002. Web.      28 Mar. 2010. <http://library.thinkquest.org/J001418/octopus.html>. 11. People's Trust for the Environment. &quot;Octopus.&quot; People's Trust for the       Environment . N.p., n.d. Web. 28 Mar. 2010. <http://www.ypte.org.uk/      animal/octopus-common-/148>. 12. Schulz, Katja, and Barna Páll-Gergely. &quot;Gastropoda.&quot; Encyclopedia of Life . N.p.,      26 Feb. 2010. Web. 28 Mar. 2010. <http://www.eol.org/pages/2366>. 13. The Assateague Naturalist. &quot;Bivalve Anatomy.&quot; The Assateague Naturalist . N.p.,      2001. Web. 28 Mar. 2010. <http://www.assateague.com/nt-bival.html>. 14. Tree of Life Project. &quot;Bilateria.&quot; Tree of Life . N.p., 2004. Web. 28 Mar. 2010.      <http://tolweb.org/Bilateria/2459>.

7. HowStuffWorks, Inc. &quot;Mollusk.&quot; HowStuffWorks . N.p., 2010. Web. 28 Mar. 2010.      <http://animals.howstuffworks.com/marine-life/mollusk-info.htm>.

8. HowStuffWorks, Inc. &quot;Snail.&quot; HowStuffWorks . N.p., 2010. Web. 28 Mar. 2010.      <http://animals.howstuffworks.com/marine-life/snail-info.htm>.

9. Forces of Nature. &quot;Characteristics Of Mollusca.&quot; Forces of Nature . N.p., 2010.      Web. 28 Mar. 2010. <http://www.forces-of-nature.net/topics/molluscum/      Characteristics_Of_Mollusca_2.htm>.

10. Life on the Rocky Shore. &quot;Octopus.&quot; Giant Pacific Octopus . N.p., Oct. 2002. Web.      28 Mar. 2010. <http://library.thinkquest.org/J001418/octopus.html>.

11. People's Trust for the Environment. &quot;Octopus.&quot; People's Trust for the       Environment . N.p., n.d. Web. 28 Mar. 2010. <http://www.ypte.org.uk/      animal/octopus-common-/148>.

12. Schulz, Katja, and Barna Páll-Gergely. &quot;Gastropoda.&quot; Encyclopedia of Life . N.p.,      26 Feb. 2010. Web. 28 Mar. 2010. <http://www.eol.org/pages/2366>.

13. The Assateague Naturalist. &quot;Bivalve Anatomy.&quot; The Assateague Naturalist . N.p.,      2001. Web. 28 Mar. 2010. <http://www.assateague.com/nt-bival.html>.

14. Tree of Life Project. &quot;Bilateria.&quot; Tree of Life . N.p., 2004. Web. 28 Mar. 2010.      <http://tolweb.org/Bilateria/2459>.

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