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Kingdom Animalia. General Characteristics and Invertebrates. What is an animal. Multi-cellular, eukaryotes, heterotrophic organisms whose cells do not have cell walls Animals can have no symmetry, radial symmetry or bilateral symmetry

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Kingdom Animalia

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kingdom animalia

Kingdom Animalia

General Characteristics



what is an animal
What is an animal
  • Multi-cellular, eukaryotes, heterotrophic organisms whose cells do not have cell walls
  • Animals can have no symmetry, radial symmetry or bilateral symmetry
  • Animals must be able to take care of the following to survive
    • Feeding, respiration, circulation, excretion, response, movement, reproduction
phylum porifera
Phylum Porifera
  • Example: sponge, all species have no symmetry
  • Feeding: Sponges are ocean organisms and are attached to the ocean floor. They are filter feeders, meaning they filter food out of the water that flows through their bodies
  • Respiration, Circulation, Excretion: All done by the flow of water through the body
  • Response: Have no nervous system but can protect selves with poisons
phylum porifera cont
Phylum Porifera, Cont.
  • Reproduction
    • Asexual– budding or gemmules
    • Sexual– are hermaphrodites and internal fertilization occurs, sperm from one sponge swims through the water to fertilize the eggs of another
  • Movement– sponges are sessile organisms
phylum cnidaria
Phylum Cnidaria
  • Jellyfish, coral, hydra
  • Feeding: carnivores, hunters that paralyze prey with poison in nematocysts also called cnidocytes (stinging cells) located on tentacles. Once paralyzed, prey is pulled into the stomach (gastrovascular cavity)
  • Respiration, Circulation and Excretion: done by the flow of water through the body
  • Movement: Hydrostatic skeleton (muscles) or jet propulsion
phylum cnidaria cont
Phylum Cnidaria, Cont
  • Response: Complicated nerve net along body, concentrated around mouth
  • Reproduction: Sexual only, two forms of life (polyp and medusa), external fertilization
  • Groups (Classes)– sea anemones and corals, jellyfish, hydras

Box Jellyfish

Most poisonous creature in the sea

Brain Coral

Portuguese Man o War

phylum platyhelminthes
Phylum Platyhelminthes
  • Flatworms: Planarian, Tapeworm
  • Feeding: Can be parasites, free- living carnivores or scavengers
    • Two way, one opening digestive tract (pharynx, mouth and anus all the same place)
  • Respiration, Circulation and excretion: Diffusion since the body is flat, flame cells help to remove liquid waste from the body
phylum platyhelminthes cont
Phylum Platyhelminthes, cont
  • Response: Simple brain called ganglia (collection of nerve cells in anterior end), nerve cords along body, eyespot to detect light
  • Reproduction:
    • Sexual- hermaphrodites
    • Asexual- fission or regeneration
  • Movement- Free living move with muscles or cilia, parasitic worms do not usually move



Blood Fluke

phylum nematoda
Phylum: Nematoda
  • Roundworms: hookworm, ascaris
  • Movement: Most roundworms are parasitic, so they don’t move on their own. Some have muscle systems to push themselves along
  • Feeding: Parasitic (mostly) so they spend their lives feeding off of other organisms through diffusion
  • Respiration, Circulation, Excretion: Diffusion across body membranes
phylum nematoda cont
Phylum: Nematoda Cont.
  • Response: Simple nervous system, ganglia in anterior end
  • Reproduction: Sexual reproduction, internal fertilization. Often, parasitic worms have complicated life cycles involving more than one host



phylum annelida
Phylum Annelida
  • Segmented worms such as leeches and earthworms
  • Feeding and Digestion: Complicated system including crop, gizzard and pharynx. Used in food storage, crushing and digestion
  • Circulation: Closed circulatory system with vessels and five hearts (earthworm)
  • Respiration: Diffusion, some respire using gills (aquatic)
phylum annelida cont
Phylum Annelida Cont.
  • Excretion: Solid waste through anus, liquid waste through nephridia (little kidneys)
  • Response: Well developed nervous system with a brain and nerve cord
  • Movement: Complicated muscular system, marine worms use paddles to swim
phylum annelida cont1
Phylum Annelida, Cont.
  • Reproduction: Sexual, most have separate sexes, some hermaphrodites
  • Groups: Earthworms, leeches, marine worms
segmented worms
Segmented Worms

Cute Earthworm

Bunch of Earthworms


phylum mollusca
Phylum Mollusca
  • Soft bodied animals with four basic body parts, foot, mantle, shell and visceral mass
  • Feeding: Variety of feeding methods, carnivore, herbivore, scavenger, parasites
  • Respiration: gills or diffusion
  • Circulatory: Open system, blood pools in cavities called sinuses
phylum mollusca cont
Phylum Mollusca Cont.
  • Excretion: Nephridia release liquid waste
  • Response: Nervous systems vary depending on type of mollusk
  • Movement: Varies depending on type, but foot is used for locomotion. Some mollusks have a foot divided into tentacles
phylum mollusca cont1
Phylum Mollusca Cont.
  • Reproduction: Variety of reproductive processes. Mostly external fertilization, some have internal
  • Groups of Mollusks
    • Class: Gastropoda (stomach foot) snails and slugs
    • Class: Cephlapoda (head foot) octopuses and squid
    • Class: Bivalves (two shells) clams and oysters, scallops


Electric Flame Scallop

English Garden Snail

phylum arthropoda
Phylum Arthropoda
  • Means: Jointed foot or leg, examples, lobster, crab, insect, spider. Have exoskeleton made of chitin
  • Growth: Must molt to grow
  • Feeding: Variety of methods, carnivore, omnivore, parasite, herbivore
  • Respiration: Tracheal tubes, spiracles, book lungs, book gills
phylum arthropoda cont
Phylum Arthropoda, Cont.
  • Circulation: Well developed heart, arteries and other vessels, open system (includes sinuses and other cavities)
  • Excretion: Malpighian Tubules, diffusion
  • Response: Brain, nerves, well—developed sense organs (eyes, taste receptors)
  • Movement: Muscles, wings, legs, swimmerets, variety of locomotion
phylum arthropoda cont1
Phylum Arthropoda, Cont
  • Reproduction: Mostly internal fertilization, males have a sex organ or deposit a sperm packet into females
  • Groups:
    • Crustaceans (lobster, crab, shrimp)
    • Chelicerates (spiders, mites, scorpions)
    • Insects (most number of animal species, butterflies, bees, ants)
class insecta
Class Insecta
  • Insects are the largest group of animals
  • Three part body (head, thorax, abdomen)
  • Three pairs of legs and other appendages
  • Complicated sense organs, movement and social structures
  • Some insects go through metamorphosis
    • Incomplete- grasshopper
    • Complete- Butterfly

Lobster… Anybody Hungry???

Black Widow Spider


phylum echinodermata
Phylum Echinodermata
  • Means: Spiny Skin, examples sea star, sea cucumber, sea urchins
  • Water vascular system: complicated system using water to take care of many body processes
    • Contains hundreds of tube feet which use suction methods powered by water flow
phylum echinodermata cont
Phylum Echinodermata, Cont.
  • Feeding: herbivores. carnivores, scavengers, filter feeders
  • Respiration and Circulation: water vascular system
  • Excretion: Solid waste released out of the anus, liquid waste through walls of tube feet by diffusion
  • Response: Radial nerve ring, scattered sensory cells
phylum echinodermata cont1
Phylum Echinodermata, Cont.
  • Movement: tube feet, thin muscles, soft joints
  • Reproduction: External fertilization, bi-lateral larvae, radial adult
  • Groups
    • Sea Urchins and Sand dollars
    • Brittle Stars
    • Sea Cucumbers
    • Sea Stars
    • Sea lilies and feather stars

Red-Lined Sea Cucumber

Sun Star

Sea Lily