2. ► From the French word “mollusque”
► From the Latin word ” molluscus"
► (Adaptation from the Latin word
“molluscus”) The word τᾲ μαλάκια means
"the soft things“
ETYMOLOGY
3. ► Most have broad, muscular feet
► Most have radula
► All have most of their organs at their
dorsal region
► Most have large ceca
CHARACTERISTICS
5. ► They have organ systems
► Their organs have multiple functions
► Ex. Their heart is important for their
reproductive system
► Most mollusks have shells
STRUCTURE
6. ► They are heterotrophic
► Some eat floating food particles
NUTRITION
7. ► The only organ only used for
reproduction is their gonads
► All the other organs have multiple
functions
REPRODUCTION
8. ► Most mollusks are motile
► Terrestrial mollusks move by a muscular
foot
► Marine mollusks move by jet propulsion
► Some mollusks are sessile and are
attached to a rock
LOCOMOTION
9. ► There are marine and terrestrial mollusks
► Ex. Snail - terrestrial, Oyster - marine
HABITAT
10. ► The anus and genitals open into the
mantle cavity
► They have two pairs of main nerve cords
OTHERS
11. ► Their subgroups are Caudofoveata,
Solenogastres, Polyplacophora,
Monoplacophora, Gastropoda,
Cephalopoda, Bivalvia, Scaphopoda,
Rostroconchia, and Helcionelloida.
► Red = extinct
SUBGROUPS
12. ► Mainly used for food
► Eaten by people around the world every
day
► The shells are turned into pearl buttons,
jewelry, and others
► If extinct, we will have less food to eat
SIGNIFICANCE
13. ► World Book Millennium 2000 vol. 13
► http://en.wikipedia.org/wiki/Mollusca
► http://www.kidport.com/reflib/science/animals/mollus
ks.htm
► http://www.mcwdn.org/Animals/Mollusks.html
REFERENCES
