Warm up What are the things that make something an animal? Why are protists not animals?
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Warm up
What are the things that make something an animal?
Why are protists not animals?
Let’s Start at the Basics Phylum Porifera…
Sponges
Symmetry… No symmetry;
(maybe radial)
No head
How Do They Get Food?
No mouth, anus, or gut!
Filter feeders…
Skeleton of…
SPICULES
SPONGIN
Reproduction…
Sexual (male and female)
May perform budding
Live
Mostly in oceans
Some in freshwater
Movement
Most do NOT move (sessile)
Some move VERY slowly
Other
Means “pore bearing”
No nerves or cells to carry impulses
Some are very SMALL;
Others are so LARGE a person could fit INSIDE!!!!!
Sponges . . . Strange But True
Re-form Regenerate Create a new
sponge from a piece.
So…
Why are sponges animals?
They
Can’t make their own food
Eat other organisms
CNIDARIANS
Radial Symmetry
Hydra Feeding…
To eat, they expand their mouth around their prey and engulf it!
Mouth
Prey
Hydra Feeding…
They have a gut cavity and a mouth.Some are predators others are filter
feeders.
Mouth
Prey
Hydra reproduction:
Cnidarians can reproduce sexually.Hydra most often bud, which is asexual reproduction.
They may have 4 buds at 1 time!
Live
Mostly in oceansSome in freshwater
Protection
Cnidocyte Cell
Nematocyst “The Stinger”
Other
Cells organized in tissues
Means stinging cells Simple nervous system
Body Forms
Stationary Polyp
Free Swimming Medusa
Porifera & Cnidaria Venn Diagram
Symmetry
Organization of Cells
Specialized Cells
Phylum Name(Meaning)
Feeding
General Characteristics
Warm up
What is 1 characteristic of the porifera that makes them animals?
What is a different characteristic of the cnidarians that makes them animals?
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