Kingdom
Animalia
What are the characteristics of all of
the members of Kingdom Animalia?
• Eukaryotic
• Multicellular
• Are Ingestive heterotrophs – must actively
take food into their bodies
• Lack a cell wall
Two divisions of Animals
• Invertebrates
– Sponges
– Jellies, coral, anemones
– Worms
• Round, Flat and Segmented (Earthworm)
– Mollusks – clams, oysters, scallops
– Arthropods
• Spiders
• Crustaceans
• Insects
– Echinoderms – starfish, urchins
• Vertebrates
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Fish
Amphibians – frogs and salamanders
Reptiles – turtles, snakes, lizards
Birds
Mammals
Body Symmetry
• Refers to how an object is cut across a central
axis.
The Earthworm
• Earthworms are segmented worms due to
the repeated sections in the organism.
• Hermaphroditic – having both sexes
• Complete digestive system – mouth to anus
• 5 hearts linking the dorsal and ventral blood
vessels in a continuous loop
• Nerve cord running along its belly (ventral
side)
External Earthworm
Internal Earthworm