unit 6 – lecture 7. kingdom animalia animals are: eukaryotic multicellular sexually reproducing...
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Unit 6 – Lecture 7
Kingdom AnimaliaAnimals Are:
eukaryoticmulticellularsexually reproducing mostly
some have asexual reproduction
Kingdom AnimaliaAnimals Have:
have no cell wallhave specalized cells
Kingdom AnimaliaAnimals Have:
most have tissuestissue – groups of specilized cells that
work together as a single unit.examples: heart, lung, skin…etcorgans are made of tissues
SymmetryAsymmetry
non-symmetricalmost are sessile
sessile – non-movingex: sponges
SymmetryRadial Symmetry
symmetrical from the center outdevelops from
2 layers of cells2 OR 3 layers of tissues
ex: starfish, jellyfish, etc.
SymmetryBilateral Symmetry
bi = two, lateral = refers to sidesymmetrical along a median linedevelops from 3 layers of tissuesex: most commonly chordates
Phylum Poriferaex: sponges, aka pore-bearersasymmetrical [or radial] – sessile2 layers of cells – no tissuesno body cavity
Phylum Poriferaget nutrients thorugh filter feeding
Phylum Poriferareproduces
sexually with gametesasexually using gemmules [like budding]asexually using fragmentation
respires through diffusion
Phylum Cnidariajellyfish, hydras, anemone, coral…etcaka stinging-celled organismsCnidarians Have:
radial symmetry2 layers of tissues simple nervous system
senses chemical “smells” & touch
Phylum CnidariaCnidarians Have:
2 body forms
Phylum Cnidariaingestion using tentacles
nematocysts – small, harpoon-like stinging cells inside of cnidocytes
Phylum CnidariaCnidarians Have:
digestion using gastrovascular cavitygastro = stomachgastrovascular cavity –
singular cavity which includes digestion and respiration
Phylum Cnidariareproduce
sexually with gametesasexually using buddingimmortal jellyfish??
respires using diffusion
HW:Finish Porifera/Cnidaria pages for tomorrowread the Cnidaria worksheet
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