Transcript Phylum Porifera

Phylum Porifera
Phylum Porifera
Sponge Cells - Function
Pore cells
Osculum
Choanocytes (Collar Cells)
Amoebocytes
Spicules
Internal cavity (spongocoel)
Water Movement
A sponge’s life depends on it!
Why is it so important?
Feeding
 Oxygen
 Waste
 Reproduction

Feeding
Reproduction
Sexual
 Sperm exits
sponge through
osculum
 Enters another
sponge and
fertilizes an egg
Asexual
 small buds break
off
 Form new sponge
clones
 Can regenerate
Sperm exiting the top of
this sponge
youtube video
Sponge Protection
Skeleton


Gemmules (dormancy)
Spongin (protein)
Spicules (Calcium

carbonate or Silicon
dioxide)


Food-filled balls of
amebocytes
Protective coating
Survive harsh
conditions
Gemmules
Glass Sponge
(Japanese Flower Basket)
End of Porifera
Correct worksheet on Cnidarians
Cnidarians
Three Classes
1) Hydrozoa – Hydra
* Polyp + Medusa
2) Scyphozoa
(cup)
– Jelly Fish
* Medusa
3) Anthozoa
* Polyps
(flowering)
– Anemonies, Coral
Commonalities
Polyp or Medusa Stage
Cnidocytes
Cnidocyte
Cnidocytes – Key
Features
Single use cells
How do they fire?
Chacteristics of
Cnidarians: Called Colenterates
means" hollow gut”
Shape
Body Parts
Reproduce
Polyp
Tentacles
Asexual
Medusa
Nematocysts
Sexual
Gastrovascular
Cavity
Hermaphrodites
Class Hydrozoa
pg 446
Diagram
Most of life is as a
polyp
Short medusa
phase
Live in colonies
Mostly Sessile
Reproduction
Asexual – Warm Weather

Budding
Sexual – Cold Weather
Sperm fertilizes egg
 Develops into a ball of cells with a hard
cover, protects until spring

Hydroid lifecycle
End Of Hydrozoa
Scyphozoa
Class Scyphozoa
Jellyfishes
Bell or Cup shaped (MEDUSA)
 All have venom but not all can hurt people
 Have a LONG Medusa phase
 Motile

Aurelia Life Cycle
Box Jelly Fish
Lion’s Mane Jellyfish
Feeding
How do you think it feeds?
Anthozoa
Class Anthozoa
Means flowering animal
Ex sea anemones, coral
Sea Anemonies
Guess How They Feed!?
When do they feed?
Symbiotic Relationship
Coral
Brain Coral
Symbiotic Relationship
Algae + Coral
Source of O2 for Coral
 Source of Nutrients for Algae

Warm, Shallow, Clear Waters
Coral
Soft and hard (calcium based skeleton)
Small polyps that live in colonies
During day, look like hard shells
Feed at night

Extend out their tentacles
Dormant Sun Coral
Sun Coral Feeding at Night
Reproduction
Sexual
Asexual
Reefs
When corals die, their hardened
skeletons remain, creating reefs
Types of Reefs
Fringing
Barrier
Atoll
Coral grows close to the shoreline
Coral reef further out from shore
Way out in ocean, formed over volcanos or
mountains under the water