Unit 6 – Lecture 7
Kingdom Animalia
 Animals Are:
 eukaryotic
 multicellular
 sexually reproducing mostly

some have asexual reproduction
Kingdom Animalia
 Animals Have:
 have no cell wall
 have specalized cells
Kingdom Animalia
 Animals Have:
 most have tissues

tissue – groups of specilized cells that work
together as a single unit.
 examples: heart, lung, skin…etc
 organs are made of tissues
Symmetry
 Asymmetry
 non-symmetrical
 most are sessile


sessile – non-moving
ex: sponges
Symmetry
 Radial Symmetry
 symmetrical from the center out
 develops from
2 layers of cells
 2 OR 3 layers of tissues
 ex: starfish, jellyfish, etc.

Symmetry
 Bilateral Symmetry
 bi = two, lateral = refers to side
 symmetrical along a median line
 develops from 3 layers of tissues
 ex: most commonly chordates
Phylum Porifera
 ex: sponges, aka pore-bearers
 asymmetrical [or radial] – sessile
 2 layers of cells – no tissues
 no body cavity
Phylum Porifera
 get nutrients thorugh filter feeding
Phylum Porifera
 reproduces
 sexually with gametes
 asexually using gemmules [like budding]
 asexually using fragmentation
 respires through diffusion
Phylum Cnidaria
 jellyfish, hydras, anemone, coral…etc
 aka stinging-celled organisms
 Cnidarians Have:
 radial symmetry
 2 layers of tissues
 simple nervous system

senses chemical “smells” & touch
Phylum Cnidaria
 Cnidarians Have:
 2 body forms
Phylum Cnidaria
 ingestion using tentacles
 nematocysts – small, harpoon-like stinging cells
inside of cnidocytes
Phylum Cnidaria
 Cnidarians Have:
 digestion using gastrovascular cavity


gastro = stomach
gastrovascular cavity –
singular cavity which
includes digestion and
respiration
Phylum Cnidaria
 reproduce
 sexually with gametes
 asexually using budding
 immortal jellyfish??
 respires using diffusion
HW:
 Finish Porifera/Cnidaria pages for tomorrow
 read the Cnidaria worksheet