Download Sponge and Cnidarian

Porifera and Cnidaria
Be able to identify the following structures:
 nematocyst
 polyp
 medusa
 asexual stage
 sexual stage
 osculum
 hydranth
 blastula
 gastrovascular cavity
Contrast the two phyla.
 Characteristics/traits of each phyla
 Feeding methods
 Methods of reproduction (sexual/asexual)
 Picture and names of examples of each phyla
 Habitat
 Adaptations in layers, tissues, and methods
 Common symmetry of both phyla
 Chapter 9 voc
Hand-outs to study:
 Notes for both groups
 Poriferan coloring worksheet
 Cnidarian coloring worksheet
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What is the function of the collar cells?
What do pore cells (ostium) do for a sponge?
What are spicules made of and what is their function?
What is the "skeleton" of the sponge?
What are three characteristics of cnidarians?
What is the main body cavity of a cnidarian and what is it's function?
What are the two life stages of cnidarians?
Make a small sketch of each, label the mouth and the tentacles. Label the endoderm,
Mesoglea, ectoderm and explain how the nerve net works.
9. What type of reproduction do poriferans have?
10. What type of reproduction do cnidarians have?
Porifera
1. Specialized types of these cells transport sperm, caught by the collar cell, to
the egg in a sponge. (Hint: they can also transport food)
2. These cells wander through the space between the two cell layers of the
sponge.
3. The unique cells in a sponge that propel water through it.
4. Sponges are called this type of feeder because they do this to the water that
they pump.
5. The structure on a choanocyte that propels the water through a sponge.
6. In all types of sponge architectures, this is the way through which water
pumped by the sponge exits.
7. The taxonomic level of the Porifera.
8. Sponge taxonomists spend a lot of time looking at these support structures.
9. The supporting and defensive structures in sponges.
10. Sponges are organized at the cellular grade and don't have cells organized as
these.
Cnidarians
1. Instead of dorsal and ventral sides, cnidarians have oral and this surface.
2. A cnidarian gastrovascular cavity is an incomplete gut because it lacks this.
3. With two different body types, we refer to the life cycle of cnidarians as being
this.
4. This embryonic tissue layer is missing in a diploblast.
5. Although not a tissue, this layer is found between the inner and outer tissue
layers of a cnidarian.
6. Cnidarians remove undigested food from the gastrovascular cavity through
this.
7. One of the consequences of not having any mesoderm is that you don't have
these either.
8. Describes the nervous system in a cnidarian.
9. If you are looking straight into the mouth of a hydrozoan, this surface is
facing you.
10. The type of symmetry characteristic of cnidarians.
11. The number of tissue layers in a diploblast.