Invertebrate 1 Phylum Mollusca

Front 1

what are the four classes of mullusks that we will be studying?

Back 1

1. Gastropods (snails)
2. Bivalves (clams)
3. Cephalopods (octopus)
4. Polyplacophora (chitons)

Front 2

[dervied Mulluscan feature] what 5 special features does all mullusc share

Back 2

1. mantle
2. muscular food
3. radula
4. ctenidium
5. shell

Front 3

what is a Mantle

Back 3

a thin skin-ike structure that encloses the internal organs and secretes the external skeleton (the shell)

Front 4

The food

Back 4

the food is the muscular locomotory sturcture

Front 5

The radula

Back 5

teeth-- use for scraping algae from rocks, tearing flesh into smaller pieces, harpooning prey, or boring through shels

Front 6

The ctenidia

Back 6

are specialized sturtures used for gas exchange and in some cases filter feeding

Front 7

The shell

Back 7

an external skeleton-- protects he soft parts of the animal.
**shell is produced from a mantle (encloses internal organs)

Front 8

Gastropods are the most diverse molluscan group and often referred to as _____

Back 8

snails

Front 9

[gastropods] important anatomical features in them

Back 9

the food, tentacles, shell, and radula (teeth)

Front 10

Bivalves are the second largest moluscan group and are mostly marine. Gives some examples of Bivalves

Back 10

clams, mussels, oysters, and scallops

Front 11

What is the most prominent feature of bivalves

Back 11

the shell composed of two similar valves (half-shells).

**the thing is made of elastic tissues and connects the two valves. responsible for opening the shell.

Front 12

Bivalves don't have a ____ or _____

Back 12

radula or head

Front 13

Features that bivalves have

Back 13

**muscular food, eyes

Front 14

what kind of feeder are bivalves

Back 14

filter feeders

Front 15

[digestive system]
Cilia lining the _____ beat pulling water containg food, into the ______

Back 15

1. ctenidia
2. inccurrent siphon

Front 16

water is filtered through the _____ and expelled out through the posterior _____

Back 16

1. ctenidia
2. excurrent siphon

Front 17

Food particles are sorted and transferred to the mouth by the _____

Back 17

labial palps

Front 18

from the labial palps food is drawn through the _____ into the stomach and smaller particles enter the ________ where extra-cellular digestion occurs

Back 18

esophagus

digestive glands (*most absorption of nutrients occures here)

Front 19

Larger or indigestible particles pass from the stomach into the ____ and out the _____.

Back 19

intestine

anus

Front 20

from the labial palps food is drawn through the _____ into the stomach and smaller particles enter the ________ where extra-cellular digestion occurs

Back 20

esophagus

digestive glands (*most absorption of nutrients occures here)

Front 21

the anus empties into the ____

Back 21

excurrent siphon

Front 22

Larger or indigestible particles pass from the stomach into the ____ and out the _____.

Back 22

intestine

anus

Front 23

[Excretory System] nitrogenous wastes in the form of ____ are excreted into the _____ by a pair of ____.

Back 23

1. ammonia

2. excurrent siphon

3. nephridia

Front 24

the anus empties into the ____

Back 24

excurrent siphon

Front 25

[Circulatory/Respiratory system] Most bivalves have an open or close circulatory system

Back 25

open circulatory system (pools of blood in the sinus)

Front 26

[Excretory System] nitrogenous wastes in the form of ____ are excreted into the _____ by a pair of ____.

Back 26

1. ammonia

2. excurrent siphon

3. nephridia

Front 27

bivalves respiratory pigment

Back 27

hemocyanin (cu) dissove in plasma

Front 28

[Circulatory/Respiratory system] Most bivalves have an open or close circulatory system

Back 28

open circulatory system (pools of blood in the sinus)

Front 29

however some bivalves use ____ as thier respiratory pigment

Back 29

hemoglobin

Front 30

bivalves respiratory pigment

Back 30

hemocyanin (cu) dissove in plasma

Front 31

are lymphocytes present?

Back 31

yes, they are. A lymphocyte is a type of white blood cell

Front 32

however some bivalves use ____ as thier respiratory pigment

Back 32

hemoglobin

Front 33

the heart is located dorsally and is easily seen du to its

Back 33

bright organe color --- it beats rhythmically to create pressure

Front 34

are lymphocytes present?

Back 34

yes, they are. A lymphocyte is a type of white blood cell

Front 35

the heart contains _____

Back 35

hemolymph

Front 36

the heart is located dorsally and is easily seen du to its

Back 36

bright organe color --- it beats rhythmically to create pressure

Front 37

the heart contains _____

Back 37

hemolymph

Front 38

hemolymph is forced into the ____ and carried to various tissures by _____, which open into cavities (or sinuses)

Back 38

1. aorta
2. vessels

Front 39

a system of sinuses collects and transports the hemolymph to the ctenidia, where _____ occurs

Back 39

gas exchange

Front 40

[Nervous System}

Back 40

**Bivalves, except for cephalopods, have poor sense organs and limited chephalization

Front 41

Reproduction System

Back 41

**dioecious
**have a pair of gonads that empty gametes into the excurrent siphon.
**Fertillization occur externally

Front 42

[class: Cephaopoda (otctopus, ect]
what is the most unusual feature in this group

Back 42

the concentration (number) of foot in the head region

Front 43

This classes is divided into two subclasses what are they?

Back 43

1. nautili --posses an external shell
2. ? (doesn't matter)

Front 44

Do they have a nervous system?

Back 44

yes well develop nervous system
**giant nerve cells with thick axons
**complex sensory systems, such as image forming eyes, and complex behaviors
**brain-- short term and long term memory

Front 45

Do they Cephaopoda have close or open systems

Back 45

closed circulatory systems