Arthropods. ARTHROPODS 1 million known species of arthropods. May be up to 30 million species in the world’s tropical rain forests. Two out of three animals living on earth are arthropods. Phylum Arthropoda Arthron- means joint pous- means foot
***Appendage may be a leg or an antenna.
Some arthropods have the head and thorax fused to form a cephalothorax
2.tracheal tubes – land (most insects)
contain leaf-like plates
(looks like pages in a book) which increase the surface area of tissues exposed to air.
one pair of large compound
eyes and 3 to 8 simple eyes.
Side eyes: pick up movement
Middle front: sharp images, some color
Side front: judge distances
nervous (blue) systems.
Sponging tongue of housefly uses saliva to digest food
But, they can also be detrimental to humans.