1. has a flattened body 2. has a digestive system with only 1 opening 3. has a simple nervous system
What are the 3 characteristics of a flatworm?
What is an example of flatworms?
In fresh water streams, lakes, and ponds
Where do most flatworms live?
1. tube like body 2. has 2 openings in its digestive system 3. has a brain with their nervous system 4. has sex organs 5. the muscles in a roundworm run lengthwise through the worm's body
What are the 5 characteristics of a roundworm?
On or in another animal and it feeds on that animal.
Where do parasitic worms live?
1. Tapeworms and flukes 2. Hookworms 3. Trichinella
What 3 examples of a parasitic worm?
Where are most parasitic worms found?
What is an example of a segmented worm?
1. Circulatory system 2. 5 enlarged tubes that act as hearts 3. has a nerve center or brain in its head 4. they have 2 sets of muscles 5. they have both male and female sex organs 6. to get oxygen earthworms breathe through their thin, moist skin
What are the 6 characteristics of a segmented worm?
an animal with a soft body and no bones
What is a mollusk?
THeir shells protect their bodies and offer support. THe shell can grow as the mollusk grows.
What does the hard shell do for a mollusk?
In the MANTLE
Where is the shell of the mollusk formed?
1. slugs 2. snails 3. clams
What are 3 examples of mollusks?
By using its muscular FOOT
How does a mollusk move?
Clams and oysters have this 2 hinged shell that fits together. When a bivalve senses danger it pulls the shells together.
What is a bivalve?
Clams and oysters
2 examples of bivalves?
it is used like a drill to cut through hard surfaces such as clamshells so the snail can get food.
What does a radula do?
What type of molllusk has a radula?
Octopods and squid
What mollusks are the most intelligent and active?
Tentacles ( octopods and squid have these)
How do these mollusks' move?
It uses its jet motion to get away quickly in any direction and it can squirt out a dark inky liquid which forms a cloud in the water and hides the animal as it gets away.
How do octopods and squid protect themselves?
an animal that has a jointed exoskeleton
What is an arthropod?
Protects it and gives it support
What are the 2 functions of the artropod's exoskeleton?
1. legs 2. circulatory system 3. brain 4. 2 openings
What are the 4 major characteristics of an arthropod?
1. grows an exoskeleton 2. sheds its exoskeleton 3. exoskeleton does not grow with the body
3 examples of artropods and describe their bodies
Out of the 3 arthropods which is the largest group?
Insects are the ONLY INVERTEBRATES that can do what?
1. pollinate 2. food source 3. eat other animals 4. produce goods
What are the 4 ways arthropods help the environment?
1. destroy crops; 2. house hold plants 3. venomou to people
What are the 3 ways arthropods hurt the environment?
an invertebrate that has an internal skeleton and spines sticking out from its body
What is an echinoderm?
Spiny and Skin
What does echinoderms mean?
They ONLY live in the OCEAN
Where do echinoderms live?
1. starfish 2. sand dollars 3. sea urchins
3 examples of echinoderms------
1. it has no brain 2. it has nerves that help it to move and feed 3. they have radial symmetry 4. they have powerful jaws and have posinous glands 5. they have 5 rows of teeth and a mouth at the center