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biology > Molluska > Flashcards

Molluska Flashcards

1
Q

Invertabrae

A

No spine

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2
Q

Molluscus

A

Soft bodied

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3
Q

Shell

A

External or internal

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4
Q

Types of molluskus I

A 
Snail
Slug 
Clam oysters 
Squids 
Octopi
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5
Q

Free swimming larvae

A

Trochophore

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6
Q

How long have they been around

A

550 million

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7
Q

Form and function

A

Coelom

Complex organ system

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8
Q

Body plan ( 4 parts )

A

Foot
Mantle
Shell
Visceral mass

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9
Q

Foot

A

Flat shaped for crawling
Spade snap for burrowing
Tentacles for catching prey

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10
Q

Mantle

A

Thin layer of tissue

Covers the body

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11
Q

Shell

A

Made by glands in mantle
Secretes calcium carbonate
Some shed it

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12
Q

Visceral mass

A

Consists of internal organs

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13
Q

Feeding

A 
Herbivores 
Filter feeders 
Carnivores 
Parasites 
Detritivores
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14
Q

Detritivores

A

Feed on organic waste

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15
Q

Radula

A

On snails abs and slugs
Flexible tong shaped structure
Teeth attached

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16
Q

Herbivores

A

Scrape algae

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17
Q

Carnivores

A

Drill through shells tear tissues of prey

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18
Q

How do some octopi kill prey

A

Toxins that paralyze

19
Q

Clams and oysters feed

A

Filter feeders using feathery gills

20
Q

Siphon

A

Tube like structure where water enters and leaves body

Directs water over gills which captures plankton

21
Q

Cilia

A

In squids

Used to move food in mouth

22
Q

Respirating aquatic mollusks

A

Gills in mantle cavity

23
Q

Land snails respire

A

Surface area of mantle cavity lined woth blood vessels
Gases diffuse along surface area
Must be moist

24
Q

Circulation

A

Pigeon and nutrients carried via closed or open circuit

25
Q

Open circulatory system

A 
Simple heart 
Blood leaves vessels to fill sinuses 
Blood passes from sinuses to gills for gas exchange 
Returns to heart 
For slow animals
26
Q

Sinuses

A

Sac like spaces

27
Q

Closed circulatory system

A

Blood ponies through but day through vessels

Never leaves blood vessels

28
Q

Excretion

A

Cells release nitrogen containing wastes into blood

29
Q

Nephridia

A

Remove ammonia from blood to be released out of body

30
Q

Simple nervous system

A 
Clams and bivalves 
Small ganglia near mouth 
Few nerve cords 
Simple sense organs 
Chemical receptors
Eyespots
31
Q

Complex nervous system

A

Octopi have highly developed brains

Most developed of all organisms

32
Q

Movement snails

A

Crawl using foot

33
Q

Movement octopi

A

Jet propulsion form water drawn into mantle cavity and forced through siphon

34
Q

Snails and bivalves reproduction

A

Sexually release sperm into water woth eggs externally

Eggs go into free swimming larvae

35
Q

Tentacle mollusks and some snails reproduction

A

Internal fertilization

Some are hermaphrodite

36
Q

Groups of mollusks

A

Gastropoda
Bivalves
Cephalopods

37
Q

Gastropoda

A 
Shell less or single shell 
Moves via 
Foot on central side 
Ex pond snails 
Land slugs 
Sea hats 
Sea butterflies 
Nudibramch
38
Q

Bivalves

A 
Food group
2 shells held together with muscle 
Ex: clam oyster
Mussels scallops sedentary 
Filter feeders
39
Q

Cephalopods

A

Octopi squids cuttle fish nautiluses
Soft bodied head stretched to single foot
Foot divided into tentacles with suckers
Small i tern always shell except for mautiluses
Octopi have no shell

40
Q

Nautiluses

A

Do not have suckers bit sticky mucus covering.

41
Q

How long have cephalopods been around

A

500 million years

42
Q

Mollusks

A

Detritus filter algae form ware

43
Q

Bio remediation

A

Medical application for finding cure

biology (4 decks)

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