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