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To purchase this program please visit http://www.greatpacificmedia.com/ Segment from the program Kingdom Animalia: The Invertebrate. DVD Description Our Invertebrates DVD looks at evolutionary trends like cephalization, segmentation, changes in body symmetry, increases in locomotive efficiency and the development of increasingly complex tissues and organs that occur as one goes from the sponges of phylum Porifera to the octopuses of class Cephalogoda.

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Another rotifer feeding at higher magnification. The digestive tract as well as the 'wheels' of cilia as clearly visible.

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Flatworms look simple but they were the first animals with a distinct head with stereo senses.

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Complex Animals: Annelids & Arthropods - CrashCourse Biology #23

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Kingdom Animalia: Phylum Mollusca | iKen | iKen App | iKen Edu

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Shape of Life: Echinoderms - The Ultimate Animal

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Hexactinellida-glass sponges
Demospongiae- demosponges
calcareous- calcareous sponges

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Anthozoas: sea anemones, corals, sea pens
Scyphozoa: jellyfish
Cuozoa: box jellyfish
Hydrozoa: polyps, obelia, hydroids

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Seisonidea: live on gills of crustaceans
Bdelloidea: live in freshwater
Monogonata: found in freshwater and marine environments

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Cestoda: tapeworms
Trematoda: flukes
Monogenea: flatworms

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Polychaetes: bristle worms
Oligochaeta: earthworms
Hirundinea: leeches

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Cephalopods: squids, cuttlefish, octopus
Gastropods: snails and slugs
Bivalvia: clams, oysters, scallops
Polyplacophora: chitons

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Chelicerates: spiders, scorpions
Crustaceans: crabs, lobsters, shrimp
Uniramia: myriapods, hexapods

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Asteroidea: sea stars or starfish
Ophiuroidea: brittle stars
Holothuroidea: sea cucumbers
Echinoidea: sea urchins
Crinoidea: sea lillies/feather stars

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Class Reptilia: reptiles
Class Amphibia: amphibians
Class Chondrichthyes: made of cartilage
Class Agnatha: agnathans
Class Mammalia: mammals

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No specialised tissue
special cells called coanocytes ->
flagella, collar, cell body
no symmetry
no embryonic germ layers
protostome

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Diploblastic- endo and ectoderm
Radial symmetry
Have gastrovascular cavity
extracellular digestion
protostome

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triploblastic
bilaterally symmetric
acoelomates
cilia- tentacles sweeps food into mouth and movement
invertebrates

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triploblastic
acoelomates
bilaterally symmetrical
protostome
no circulatory system

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triploblastic
invertebrates
have internal body cavity- coelom
segmented with ventral/dorsal sides
closed circulatory system

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bilvalve-clam
bilaterally symmetrical
triploblastic
coelomate
protostome
gastropod- snail

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segmented bodies
coelomates
protostome
triploblastic
bilateral symmetry
head, thorax, abdomen

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deutrostome
radially symmetric (adults)
bilaterally symmetric (larva)
coelomate
triploblastic
water vascular system & coelem
endoskeleton

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triploblastic
bilaterally symmetrical
notocord- stiffening and made of cartilage
hollow dorsal nerve cord
endoskeleton
compete digestive tract

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asexual reproduction
produce sperm and egg cell (hermaphradites)
can regenerate missing body parts
reproduce through budding
filter feeders

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reproduce sexually through cleavage and gastrulation
reproduce asexually through budding
nematocysts- stinger in jellies

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produce asexually- parthenogenesis
unable to grow new cells when damaged
cilia around mouth

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parthenogenesis- reproduction without fertilization
divide asexually by diving themselves
have both male and female reproductive systems
can regenerate body parts

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many have external shell made of calcium carbonate
open circulatory system

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use gills for gas exchange/breathing OPEN
exoskeleton with joint appendages
locomotion

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can regenerate damaged body parts
move using tube feet

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use gills for breathing
tail for swimming

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integrates asexual and sexual reproduction
disperse via eggs
respiration through diffusion
can undergo tissue regeneration