animal a living organism that is eukaryotic and multicellular, has organized tissues, and must obtain food rather than making it by photosynthesis

Living Organisms have life spans can reproduce grow are made of cells

eukaryotic cells have a nucleus and have membrane-bound organelles

Kingdom Animalia in invertebrates vertebrate vertebrates no backbone

Invertebrate Skeletons internal external

Phylum Porifera Por pore

Phylum Porifera sessile does not move about is permanently attached to a solid object

pore cells sponge

collar cells sponge

filter feeders sponge

sponge

amoeba-like cell sponge

spongin sponge

spicule sponge

Phylum Cnidaria

Phylum Cnidaria hydras sea anemones coral jellyfish

Phylum Cnidaria large central cavity surrounded by two tissue layers

ectoderm endoderm

hydro hydrostatic static water standing

gastrovascular cavity mouth

Phylum Cnidaria large central cavity surrounded by two tissue layers tentacles with stinging cells

nematocyst stinging cell

Phylum Cnidaria large central cavity surrounded by two tissue layers tentacles with stinging cells digest food in gastrovascular cavity

bilateral symmetry radial symmetry radial symmetry

Phylum Cnidaria large central cavity tentacles with stinging cells digest food in gastrovascular cavity radial symmetry

Phylum Cnidaria umbrella shaped tube-like

radial symmetry

calcium carbonate base tentacles coral polyp mouth calcium carbonate base

Phylum Platyhelmenthes

Flatworms free-living parasitic does not depend on a host obtains nourishment from and harms another organism

Nervous System Planarians neurons long, thin nerve cells found throughout body carry impulses from one point to another

Nervous System Planarians nerve collection of neurons wrapped in protective coverings

longitudinal nerves transverse nerves

Nervous System Planarians ganglion coordination center simple brain

Nervous System Planarians stimulus/stimuli something a planarian can sense

eyespots

pharynx

Digestive System Planarians long branched cavity

Digestive System Planarians lined with gastroderm secretes enzymes to digest food absorbs semi-digested material

flame cells excretory pores

Phylum Nematoda round, tube-like bodies tapered at each end some are parasites some are free-living some are microscopic

Phylum Nematoda hookworm pinworm trichina worm guinea worm

Phylum Annelida segmented body

epidermis

epidermis exchanges gases secretes thin outer coating cuticle protects from harmful parasites and substances

muscle layers provide support help the worm move

circular muscles long muscles

sensory receptor a structure that can sense a stimulus and then start an impulse along a neuron

sensory receptors neurons that send impulses to the ganglia

nerve cord a bundle of neurons

nerve cord large ganglion small ganglia

ganglion interprets decides

impulse sensory receptors neurons ganglia

ganglia other neurons muscles bristles

closed circulatory system blood never leaves the blood vessels

dorsal blood vessel aortic arches

aortic arches help control blood pressure five pair

ventral blood vessel

capillaries thin walls exchange of substances arteries—away veins—toward

mouth upper lip helps force food in

pharynx muscle contractions help pull food in secretion of liquids for lubrication

esophagus tubelike passageway carries food from pharynx to crop

crop temporary storage chamber for food

crop

gizzard mechanical digestion

intestine chemical digestion folded ridges for absorption

anus castings

nephridia/ excretory tubules tiny looped tubes waste is passed out through pores

nephridia

epidermis Oxygen enters the skin and is absorbed by capillaries. CO2 passes out of capillaries through the skin.