Kingdom Animalia

Types of Symmetry Radial Bilateral Asymmetrical – No symmetry

Phylum Porifera Pore bearing

Phylum Porifera Pore bearing Asymmetrical Sessile Skeleton made of Spicules or Spongin

Spicules Made of CaCO 3

Spicules Made of SiO 2 Deep sea sponge called “glass sponge”

Spongin – protein fibers

Phylum Porifera Pore bearing Asymmetrical Sessile Spicules or Spongin Filter feeder

Collar Cells – Ingest food, move water Spicules – Structure & Defense Pore – Allows water in Flagella – Moves water Osculum – excurrent opening Collar cells

Phylum Porifera Pore bearing Asymmetrical Sessile Spicules or Spongin Filter feeder Aggregation of specialized cells. No tissues. No Circulatory System No Digestive system External, sexual reproduction; often hermaphroditic

Phylum Porifera Pore bearing Asymmetrical Sessile Spicules or Spongin Filter feeder Aggregation of specialized cells. No tissues. No Circulatory System No Digestive system External, sexual reproduction; often hermaphroditic Reproduces asexually by budding

Phylum Ctenophora Common name – comb jellies 8 comb rows8 comb rows Sticky cellsSticky cells Biradial symmetryBiradial symmetry Has two layers of tissueHas two layers of tissue

Phylum Ctenophora Common name – comb jellies 8 comb rows8 comb rows Sticky cellsSticky cells Biradial symmetryBiradial symmetry Two tissue layersTwo tissue layers Mouth opens to a branched gut, complete digestive systemMouth opens to a branched gut, complete digestive system

Phylum Ctenophora Common name – comb jellies 8 comb rows8 comb rows Sticky cellsSticky cells Biradial symmetryBiradial symmetry Two tissue layersTwo tissue layers Complete digestive systemComplete digestive system Often bioluminescentOften bioluminescent

Phylum Ctenophora Common name – comb jellies 8 comb rows8 comb rows Sticky cellsSticky cells Biradial symmetryBiradial symmetry Two tissue layersTwo tissue layers Complete digestive systemComplete digestive system Often bioluminescentOften bioluminescent Most are hermaphrodites – external sexual fertilization, sperm & egg are released through mouthMost are hermaphrodites – external sexual fertilization, sperm & egg are released through mouth

Larvae

Phylum Ctenophora Common name – comb jellies 8 comb rows8 comb rows Sticky cellsSticky cells Biradial symmetryBiradial symmetry Two tissue layersTwo tissue layers Complete digestive systemComplete digestive system Often bioluminescentOften bioluminescent Most hermaphrodites –Most hermaphrodites – external sexual fertilization No respiratory systemNo respiratory system No circulatory systemNo circulatory system Nerve Net (no centralization)Nerve Net (no centralization)

Statocyst

Benthic ctenophore

Phylum Cnidaria Stinging cells (nematocysts)

Nematocyst

Phylum Cnidaria Stinging cells (nematocysts) Radial symmetry Incomplete digestive system

Phylum Cnidaria Stinging cells (nematocysts) Radial symmetry Incomplete digestive system Some alternate between polyp & medusa

PLANULA LARVAE

POLYP

Strobilization

EPHYRA

MEDUSA

Hydroids

Corals

Corals and Zooanthids

Sea Anemones

WORMS

Phylum Platyhelminthes Flatworms - Dorsoventrally flattened (top to bottom) Digestive tract has one opening Simple nervous system with two ganglia

Phylum Platyhelminthes Flatworms - Dorsoventrally flattened (top to bottom) Digestive tract has one opening Simple nervous system with two ganglia No true circulatory or respiratory systems

Phylum Platyhelminthes Three tissue layers – ectoderm, mesoderm, endoderm Most are simultaneous hermaphrodites, and can often self fertilize

Tapeworm in a Carp

Phylum Nematoda Long, tapered, cylindrical shape Longitudinal muscles

Phylum Nematoda Long, tapered, cylindrical shape Longitudinal muscles Complete Digestive system No circulatory or respiratory systems Pseudocoelom Roundworms

Phylum Nematoda Long, tapered, cylindrical shape Longitudinal muscles Complete Digestive system No circulatory or respiratory systems Pseudocoelom Reproduce sexually. Internal fertilization. Fertilized eggs are released into the water. Roundworms

PSEUDOCOELOM

Phylum Annelida Segmented worms Coelom

Phylum Annelida Segmented worms Coelom Circular muscles

Phylum Annelida Segmented worms Coelom Circular muscles Circulatory system (closed system)

Phylum Annelida (polychaetes) Segmented wormsSegmented worms CoelomCoelom Circular musclesCircular muscles Circulatory systemCirculatory system (closed system) Reproduction – separate genders release sperm & egg into water

Class Polychaeta Many BristlesMany Bristles

Gills

Sandcastle Worm

Other Worms Ribbon Worms (Nemerteans)

Other Worms Peanut Worms (Sipunculids)

Other Worms Gutless Worms (Pogonophora)