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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?