Monday March 2, 2009Monday March 2, 2009

There are 8 Invertebrate Animal Phyla, today we will begin researching the first

two, can you name them?

Where would you find these organisms?Why?

Phylum Porifera (Sponges)

Who” is the most famous Sponge?

Phylum Porifera “Pore-Phylum Porifera “Pore-Bearers”Bearers”1. Major Classes & Examples:

Calcarea – spicules (skeleton) of calcium carbonateHexactinellida - spicules of silicaDemospongia – most diverse; over 90% of species

Demospongia: What kind of symmetry does it have?

2. Symmetry:

Radial or Asymmetrical

Phylum PoriferaPhylum Porifera

3. Body Openings:-None

4. Classifying CharacteristicsSimplest animals, multicellular· No organs or body systems

· Sessile (do not move)· Skeleton composed of spongin (soft)

and spicules (hard)

Phylum PoriferaPhylum Porifera

5. Reproduction (Sexual or Asexual)

Sexual – the union of sponge egg and sperm results ina swimming larva that escapes from the parent sponge

and grows a new individual.

Asexual – small buds can break off and live separately, Sponges can regenerate.

Phylum PoriferaPhylum Porifera

6. Feeding Types:

- Filter Feeder

IMPORTANCE & IMPORTANCE & INTERESTING EXTRASINTERESTING EXTRAS

VIDEO CLIPVIDEO CLIP

Phylum Porifera

Phylum Cnidaria (Stinging Phylum Cnidaria (Stinging Cell)Cell)

1. Major Classes & Examples:

Class Hydrozoa – Portuguese Man-of-War & HydrasClass Scyphozoa – JellyfishClass Anthozoa – Sea Anemone and Corals

2. Symmetry:

Radial

Phyum CnidariaPhyum Cnidaria

3. Body Openings:

1 - mouth

4. Classifying Characteristics

-Aquatic, mostly in ocean-Live as polyps (sessile) or

medusa (swimming)-Classified by their spring-loaded

stinging cells

Phylum CnidariaPhylum Cnidaria5. Reproduction Sexual or Asexual

Phylum CnidariaPhylum Cnidaria

6. Feeding types:Tentacles capture small animals with nematocysts

and paralyze them with poison – tentacles push prey into the cnidarians mouth

IMPORTANCE & IMPORTANCE & INTERESTING EXTRASINTERESTING EXTRAS

VIDEO CLIPS (5)VIDEO CLIPS (5)

Phylum Cnidaria

Phylum Porifera (Sponges)“Who” is the most famous

Sponge?

Your HOMEWORK:

1. What is WRONG (scientifically speaking)with Sponge Bob? You must

have at least 5 things!

Phylum Cnidaria: ClosurePhylum Cnidaria: Closure

2. How do you think a “jelly fish” obtained this common name?

3. How would you explain to someone(scientifically speaking) why a jelly fish is

not a fish?