INVERTEBRATES
-they
don`t have a backbone or an internal skeleton.
-
most invertebrates lay eggs.
-Invertebrates
can be classified into six groups:
arthopods,molluscs,sponges,cnidarians,echinoderms and annelids.
(By Marthin, 5th grade)
1.-ARTHROPODS
*ARTHROPODS
HAVE AN EXTERNAL SKELETON CALLED
AN EXOSKELETON.
*ARE
DIVIDED INTO 4 GROUPS:
INSECTS
INSECTS
- HAVE 3 PARTS:
- A HEAD
- A THORAX
- AN ABDOMEN
- HAVE 1 OR 2 PAIRS OF WINGS.
- HAVE 1 PAIR OF ANTENNAE.
- HAVE 3 PAIRS OF LEGS.
- CAN LIVE ON LAND/IN WATER.
- SOME INSECTS CAN FLY.
(Created by Alejandro,5th grade)
ARACHNIDS
ARACHNIDS
-HAVE
2 BODY PARTS
-HAVE
4 PAIRS OF LEGS
-HAVE
8 EYES
-LIVE
ON LAND
-SPIDERS,
SCORPIONS…
(By David and Jesús, 5th grade)![Body sections of an arachnid or spider](http://www.ducksters.com/animals/arachnid_body_sections.jpg)
1.- Four pairs of legs.
2.- Cephalothorax.
3.- Abdomen.
MYRIAPODS
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