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What are mollusks?
soft-bodied invertebrates that usually have a shell
Examples of mollusks
What is the thin membrane that secretes the shell for many mollusks?
What type of circulatory system do mollusks have?
What does "open circulatory system" mean?
the blood is not always inside the blood vessels the way a human's is
How do Octopus and Squid swim?
using a jet-action water vascular system, water is forced out through a tube-like structure near the head which sends the mollusk quickly in the opposite direction
Which mollusk is used in aquariums to help keep them clean from algae?
How does the snail keep the aquarium clean?
using their radula
What is a radula?
A tongue-like organ used to scrape algae off of rocks
What are the 3 classes of mollusks?
What is the largest group of mollusks?
What is unique about gastropods?
they have only one shell
What is another name for a Gastropod?
What does Gastropod mean?
What are examples of gastropods?
What is unique about a Bivalve?
It has a hinged shell in two parts
What are three examples of bivalves?
Which bivalve is well-known for producing pearls?
How are pearls made?
- an irritant, such as a grain of sand, is embedded in the mantle
- the mollusk then coats the irritant with the same material used to produce the lining of its shell
What does Cephalopod mean?
What are 4 examples of Cephalopods?
What is the only member of the Cephalopod that has an external shell?
What do the arms of the Octopus and Squid have?
disc-shaped suckers used for gripping their prey
What is the difference in an Octopus and a Squid?
octopus has 8 arms, the Squid has 10
What does Arthropoda mean?
What is the largest phylum of animals?
What is an appendage?
- a structure that grows from the body
- example: arms and legs
What are the 4 appendages of an arthropod?
- jointed legs
What are the 3 body regions of an arthropod?
What are the 4 classes of Arthropods?
Which class of arthropods is the largest?
What are some examples of insects?
How do insects breathe?
using Spiracles, located in their abdomen
What is a tympanum?
organ used by insects for hearing, located under their wings
How many eyes do insects have?
- 3 simple eyes
- 2 compound eyes
How do insects use simple eyes?
use them for detecting light and dark
How do insects use compound eyes?
used for detecting color and movement in all directions at once
What are insects that live in colonies called?
What are 2 good examples of social animals?
What does metamorphosis mean?
the change of body form and appearance
What are 2 types of metamorphosis?
What is complete metamorphosis?
- the larva looks entirely different from the adult
- example: butterfly
What is incomplete metamorphosis?
- the larva is a "mini" version of the adult
- example: grasshopper
What are the 4 stages of complete metamorphosis?
What happens during the pupa stage?
- insect forms a chrysalis or spins a cocoon around itself
- it does not eat during this time and goes through many changes
What are the 3 stages of incomplete metamorphosis?
What are examples of arachnids?
What are examples of crustaceans?
give 2 examples of myriapods
What are centipedes also known as?
What are millipedes also known as?
What is an enchinoderm?
- a "spiny-skinned" animal includes:
- sea cucumbers
- brittle stars
- sea urchins
- sand dollars