SIMPLE INVERTEBRATES
Animals that don't have backbones.
Invertebrates
This is a segmented worm (class name)
Annelid
Their protective hard outer covering of invertebrates
Exoskeleton
Do echinoderms have a defined head?
No
How do cephalopods eat?
They catch prey with their tentacles
List the 3 types of invertebrates covered in this unit.
worms, mollusks, and echinoderms
The most familiar annelid worm that we often see in our soil
An earthworm
Squids and octopi are...
Cephalopods
A series of tubes filled with liquid that allow them to move
Water vascular system
How to bivalves eat?
filter feeding
An organism that invades and feeds on the body of another living organism, or host.
A parasite
Name the three main types of worms.
Platyhelminthes, nematodes and annelids
The radula is...
The tongue-like organ of gastropods
List three examples of echinoderms
sea urchin , starfish, sand dollar, sea cucumber
How do gastropods eat?
By scraping food from the surface as they crawl along.
The body plan where the body can be divided in half and it is the same on BOTH sides is
Bilateral symmetry
The three major classifications of Mollusks.
Gastropods, bivalves and cephalopods
Slugs and snails are...
gastropods
How do starfish eat?
They eject their stomachs into their prey and eat it from their insides out
Cephalopod means...
Head foot
Name two ways invertebrates help humans
Earthworms increase soil quality, sponges and corals are raw materials that help with hygiene, insects pollinate flowers and food, we can eat mollusks, etc.
What is the mantle?
A thin membrane that covers the mollusk's organs
Give two examples of bivalves
clam scallop oyster mussel whelk
What does echinoderm mean?
spiny skin
Gastropod means...
stomach foot