zoology Lab Readings

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What cna porifera be equated to in laymens terms

Porifera are sponges
what types of symetry do sponges show

Radial or asymetricle
In its simplest form what do sponges resemble?

A Hollow tube with one end of it closed
What is the hollow tube of a sponge called?

spongocoel
How many layers of CELLS does the tube wall consist of

TWO layers of cells
How many layers in total does the sponges walls have
- three layers
- Two layers of cells
- and a gelatinous layer
What is the name of the outside layer of cells of a sponge

PINACOCYTES is the outside layer of cells of a sponge
What is the innermost layer of cells called

CHOANOCYTES
Whats special about CHOANOCYTES

they are flagellated
What internal sturcture supports sponges soma

Spicules support the sponges body
What are the incurrent pores called

ostium (singular)
whats the name for the excurrent hole (usually one big one at the top)

osculum
What are the three body types of sponges
- 1. Asconoid
- 2. Syconoid
- 3. Leuconoid
Verbelaly descrie the key aspect of the ASCONOID body type in sponges

ASCONOID body type simply has perferations thoruhgout its three layers taht go straight into the SPONGOCOEL
What is the overall structure of the SYCONOID body type
- SYCONOID body type has its OSTIA (incurrent pores) located on cilia like projects that occur from the sponges outer layer as such
- l__
- _ _l
- l

Author

40127

Card Set

zoology Lab Readings

Description

Exercise 2 - Phylum Porifera- Lab readings

Updated

2010-10-06T06:04:17Z

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