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Sponges belong to what phylum?
How many species of sponges are there?
What two types of species of sponges are there and how many of each?
- Freshwater and marine.
- 150 freshwater species.
- All others are marine.
Describe the structure of sponges.
- No symmetry.
- Have no tissues or organs.
- 2 layers of cells.
- Have collar cells.
- Have flagella.
What is the osculum?
The osculum is the top of the sponge where the water is pumped through.
How does a sponge filter water?
Water enters through pores and is pumped through the top of the sponge.
What is the job of the flagella?
a) To capture food and absorb it
b) To move water
c) To absorb nutrients
d) To aid in movement
- b) To move water through the sponge
- Flagella whips back and forth.
What type of a feeder is the sponge?
How do sponges feed?
Collar cells capture food and absorb it.
What do sponges eat?
- Bits of organic matter.
- One sponge even eats small shrimp.
How do sponge cells obtain oxygen?
Cells absorb oxygen directly from passing water.
How is food distributed to the other cells, besides collar cells, of the sponge?
Food is carried from collar cells to other cells by amebocytes.
How does excretion work with sponges?
Excretion is directly from cells into the water.
Describe the response and movement characteristics of sponges.
- Adult sponges have very little response or movement.
- Sponge larva can swim around.
How can sponges reproduce?
- Sexual reproduction
- Asexual = Budding
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