Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
21 Cards in this Set
- Front
- Back
|
Which phylum do sponges belong to?
|
Porifera |
|
|
What peticular character do all animals except for sponges have? |
"True"/specialized tissues |
|
|
What word describes the movement of sponges? What does it mean? |
Sessile; they do not move. |
|
|
How do sponges feed? What kind of digestion do they have? |
Sponges are filter feeders. They are the only animals that have intracellular digestion. |
|
|
Are sponges marine or freshwater?
|
Most are marine, but some are freshwater |
|
|
How many layers of cells to sponges have? What separates them? |
Two; Mesoglea |
|
|
What is a sponge's inner layer of cells made of? What do they do? |
Choanocytes (collar cells)- move water through pores in sponges body |
|
|
What is a sponge's outer layer of cells called? |
Epidermis |
|
|
What is the mesoglea? |
The gelatinous, protein matrix between cell layers where amoebocytes "crawl around" |
|
|
What is another word for mesoglea? |
Mesohyl |
|
|
What are amoebocytes (pron. ameba-sites)? What do they do? What is special about them? |
Mobile cells that make supportive fibers in the middle body region; store, digest, and transport food and nutrients to other cells of the body; produce materials for spicules; excrete wastes; and can change into any kind of cell the body needs, like sperm or egg by meiosis. |
|
|
What is the spongocoel (pron. sponge-o-seal)? |
The large open cavity inside the sponge body |
|
|
What is the osculum? |
The large opening at the top of the sponge where water exits the spongocoel |
|
|
What are spicules? What do they do? What is unique about them? |
Small, needle-like skeletal structures that provide structural support and deter predators. Sponges are the only animals with them. |
|
|
Describe sponges' respiratory mechanism. |
Diffusion |
|
|
Describe sponges' nitrogen waste removal mechanism. |
Diffusion |
|
|
Describe sponges' circulatory mechanism. |
None, except for what amoebocytes provide |
|
|
Describe sponges' nervous mechanism. |
No nervous control; some chemical |
|
|
How do sponges move? |
Some contractile fibers in epithelial cells |
|
|
How do sponges maintain internal stability in marine and freshwater? |
Marine- conformers FW- contractile vacuoles |
|
|
How do sponges reproduce? |
Sexual: Sponges are hermaphroditic- each individual functions as both male and female by producing eggs and sperm. Asexual: budding and breaking off- NOT to be confused with spawning |
