Funny mollusk songFunny mollusk song

http://www.youtube.com/watch?http://www.youtube.com/watch?v=dEwnarCYIO4&feature=related&safety_v=dEwnarCYIO4&feature=related&safety_mode=true&persist_safety_mode=1&safemode=true&persist_safety_mode=1&safe=active =active

Did You Know?Did You Know?1. Oyster Consumption 1. Oyster Consumption Another interesting fact about oysters is that nearly two Another interesting fact about oysters is that nearly two billion pounds of these mollusks are eaten every year, billion pounds of these mollusks are eaten every year, and Americans eat their fair share. From 1990 to 1995, and Americans eat their fair share. From 1990 to 1995, for example, Americans ate about fifty million pounds of for example, Americans ate about fifty million pounds of these popular mollusks. these popular mollusks.

2. Is It a Male or Female Oyster?2. Is It a Male or Female Oyster?Just like warm-blooded animals, oysters are either male Just like warm-blooded animals, oysters are either male or female. But, oysters have gonads that generate eggs, or female. But, oysters have gonads that generate eggs, as well as sperm. So, oysters have the ability to change as well as sperm. So, oysters have the ability to change their sexes, which they do, at least once. their sexes, which they do, at least once.

4/2/124/2/12The Octopus ShowThe Octopus Show

What are chromatophores and why do they What are chromatophores and why do they use them? ___________________use them? ___________________What is the largest species of octopus?What is the largest species of octopus?________________________________________________________________How many species of octopuses are there?How many species of octopuses are there?__________________________________________________________Can an octopus regenerate a lost tentacle Can an octopus regenerate a lost tentacle /arm? _________ What other animals can /arm? _________ What other animals can do this? ____________________do this? ____________________

Monday 4/2Monday 4/2

Objective: I see one of the most intelligent Objective: I see one of the most intelligent mollusks in action.mollusks in action.

Agenda:Agenda:– Name votingName voting– The Octo. showThe Octo. show

Homework: NoneHomework: None

Did You KnowDid You Know

In Sweden there is a Christmas tree, also In Sweden there is a Christmas tree, also known as a Yule tree which has root known as a Yule tree which has root system that has been growing for 9,550 system that has been growing for 9,550 years (sometime around the end of the Ice years (sometime around the end of the Ice Age). The actual offshoot of the tree is Age). The actual offshoot of the tree is only 600 years old.only 600 years old.

Tuesday 4/3Tuesday 4/3

Objective: I will know the basic Objective: I will know the basic characteristics of a mollusk!characteristics of a mollusk!

Agenda:Agenda:– Mollusk notesMollusk notes– Mollusk group: if you want me to print tomorrow Mollusk group: if you want me to print tomorrow

is when I need to have a digital copy!is when I need to have a digital copy!

Homework: Please tell LOLA hi on the way Homework: Please tell LOLA hi on the way out todayout today

Phylum Phylum MolluscaMollusca

Includes:Includes:

Snails-class GastropodaSnails-class Gastropoda

Clams-class Bivalvia Clams-class Bivalvia

Octopuses, Squids-class CephalopodaOctopuses, Squids-class Cephalopoda

There are more species of mollusks in the ocean There are more species of mollusks in the ocean than any other groupthan any other group

Soft body protected by a shell of calcium Soft body protected by a shell of calcium carbonatecarbonate

Very diverse in body structures and habitsVery diverse in body structures and habits

Mollusk Diversity

BiologyBiologyMuch more complex than Cnidarians or Much more complex than Cnidarians or SpongesSponges

Has a separate mouth and anus (1 way)Has a separate mouth and anus (1 way)

Has salivary and digestive glandsHas salivary and digestive glands

herbivores & carnivores (predators & filter herbivores & carnivores (predators & filter feeders)feeders)

circulatory system transports nutrients and circulatory system transports nutrients and oxygenoxygen

Heart pumps blood to all tissuesHeart pumps blood to all tissues

Most have open circulatory system (leaky), Most have open circulatory system (leaky), cephalopods a closed circulatory systemcephalopods a closed circulatory system

Nervous system simple to complexNervous system simple to complex

Most have separate sexesMost have separate sexes

Some species are hermaphroditesSome species are hermaphrodites

External fertilization- bivalves, chitons, & some External fertilization- bivalves, chitons, & some snailssnails– Sperm & eggs are released into waterSperm & eggs are released into water

Internal fertilization-cephalopods & most snailsInternal fertilization-cephalopods & most snails– Cephalopods have modified arm to transfer Cephalopods have modified arm to transfer

sperm to femalesperm to female

class Gastropodaclass Gastropoda

Snails-”stomach foot”Snails-”stomach foot”

Largest groupLargest group

Approx 90,000 speciesApprox 90,000 species

Mostly marine Mostly marine

Body is coiled up inside shellBody is coiled up inside shell

Shell sits on a ventral footShell sits on a ventral foot

Nudibranch(sea slug-no shell)

Tulip snail(with shell)

Body StructureBody Structurethin layer of tissue that produces the thin layer of tissue that produces the shellshell

muscular, used in locomotionmuscular, used in locomotionsome are well developed & have eyessome are well developed & have eyes

area with small teeth used in scraping area with small teeth used in scraping algae or other food from surfaces, made algae or other food from surfaces, made of chitinof chitinhard plate used to close opening once hard plate used to close opening once head/foot retracts into shellhead/foot retracts into shellGas exchange is through gillsGas exchange is through gills

MantleMantle

FootFootHeadHead

RadulaRadula

OperculumOperculum

class Bivalviaclass Bivalvia

Oysters (cement themselves Oysters (cement themselves to hard surface)to hard surface)

Clams (burrow)Clams (burrow)

Mussels (attach to rocks Mussels (attach to rocks using byssal threads),using byssal threads),

Body compressed between Body compressed between two shellstwo shells

class Cephalopoda-2 in to 30 ftclass Cephalopoda-2 in to 30 ft

Cephalopods-most complex brain of all Cephalopods-most complex brain of all invertebratesinvertebrates– considered intelligent and capable of considered intelligent and capable of

learninglearningMost cephalopods display color changes Most cephalopods display color changes correlated to certain behaviorscorrelated to certain behaviorsHectocotylusHectocotylus-Specialized arm transfers a -Specialized arm transfers a spermatophore (packet of sperm)spermatophore (packet of sperm)After eggs hatch female usually diesAfter eggs hatch female usually dies

Blue-ringed Octopus (Hapalochlaena)

giant pacific octopus - Octopus

dofleini

Key Terms for MollusksKey Terms for Mollusks

MantleMantle

SiphonSiphon

RadulaRadula

VeligerVeliger

CerataCerata

SepiaSepia

OperculumOperculum

HectocotylusHectocotylus

Give the Give the function and function and description of description of

the listed terms.the listed terms.

Find terms in Find terms in ChapterChapter

5 and notes.5 and notes.

Optional:Optional:

Find a memory Find a memory device: device:

acronym,acronym,

drawing, rhyme drawing, rhyme etc… etc…

When finished with the above terms answer questions 1-8 on page 5-43.