poriferans and Cnidarians

What is symmetry?

the balanced distribution of duplicate body parts or shapes

What are the different kinds of symmetry?

Asymmetry

Bilateral symmetry

Radial symmetry

What is an invertebrate

And animal lacking a backbone or a spinal column

What are the general characteristics of poriferans?

No major organs

Small in size

Filter feeding

What does poriferan mean?

Pore-bearing

What’s are the TWO main structural substances that sponges are made of?

Spongin

Spicules

What is a hermaphrodite?

A sponge that is both male and female

What is budding?

when a piece of a sponge breaks off and eventually grows and forms into a new adult sponge

What are common predators of sponges?

Sea turtles

Pufferfish

Angel fish

Parrot fish

Some crabs

What are the general characteristics of Cnidarians?

cnidocytes

Two basic body forms (Medusa and polyps)

Radial symmetry

What does the name cnidarian mean?

Stinging cell

What are the different classes of cnidarians? What are examples of organisms in each class?

Anthozoa- sea anemones and corals

Scyphozoa- jellyfish

Cubozoa- box jellies

Hydrozoa- Portuguese Man O’ War

What is a cnidocyte?

Specialized stinging structure

What is the anatomy of a jellyfish?

Bell

Canals

Tentacles

Mouth

oral arm

What is the Medusa form of a jellyfish?

Medusa- Moving- adult

What is the polyp form of a sponge?

Polyp- stationary

What is the lifecycle of a jellyfish?