invertebrate groups

SCIENCE-THIRD PRIMARY YEAR CEIP CORTES DE ARAGÓN

(Teacher: Miguel Navarro)

INVERTEBRATE GROUPSINVERTEBRATE GROUPS- INVERTEBRATE ANIMALS ARE THOSE ANIMALS THAT DO

NOT HAVE A BACKBONE.

- WE CAN CLASSIFY INVERTEBRATES INTO 3 GROUPS: ARTHROPODS (ARTRÓPODOS), MOLLUSCS (MOLUSCOS) AND OTHER INVERTEBRATE GROUPS.

ARTHROPODSARTHROPODS- THIS GROUP INCLUDES 4 SUBGROUPS: INSECTS,

ARACHNIDS, MYRIAPODS AND CRUSTACEANS

- THEY HAVE EXOSKELETON

1.- INSECTS1.- INSECTS

- THERE ARE NEARLY ONE MILLION KNOWN SPECIES OF INSECTS

- THEY HAVE EXOSKELETON, 2 ANTENNAE AND 6 LEGS- MOST HAVE WINGS- THEIR BODY HAS 3 SECTIONS: HEAD, THORAX AND

ABDOMEN- EXAMPLES: WASP (AVISPA), BEE (ABEJA), LADYBIRD

(MARIQUITA), MOSQUITO, ANT (HORMIGA), MANTIS, DRAGONFLY (LIBÉLULA) OR GRASSHOPPER (SALTAMONTES)

STUDY THE EXAMPLE OF THE PARTS OF INSECTS IN PAGE 86

2.- ARACHNIDS2.- ARACHNIDS

- THEY HAVE EXOSKELETON, 8 LEGS AND 8 EYES- THEIR BODY HAS 2 SECTIONS: HEAD AND ABDOMEN- EXAMPLES: SCORPION AND SPIDER

3.- MYRIAPODS3.- MYRIAPODS

- THEY HAVE EXOSKELETON, 2 ANTENNAE AND LOTS OF LEGS

- THEIR BODY HAS LOTS OF SEGMENTS- EXAMPLES: MILLIPEDE (MILPIÉS) AND CENTIPEDE

(CIEMPIÉS)

4.- CRUSTACEANS4.- CRUSTACEANS

- THEY HAVE EXOSKELETON, 2 EYES AND 4 ANTENNAE- MOST HAVE 8 LEGS AND 2 CLAWS- EXAMPLES: LOBSTER (LANGOSTA) AND CRAB

(CANGREJO)