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Section 35.1- Porifera
Third part of test on Monday (March 2, 2015)
14
Biology
10th Grade
02/28/2015

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Term
Sessile
Definition
Attatch to surfaces, does not move as adult.
Term
Hermaphrodite
Definition
Have both sperm and egg, can fertilize with 100% of their population. This is good for sessile organisms.
Term
Collar cell/choanocyte
Definition
Interior of cylinder; flagella draw water into cylinder through pores in body wall.
Term
Porocyte
Definition
Cells around the pores.
Term
Amebocyte
Definition
Travel around distributing food and oxygen to the cells of the epidermis.
Term
Epidermal cells
Definition
Protective outer covering of sponge.
Term
Spicules
Definition
Tiny, hard particles of glass (CaCO3) or chalk (SiO2) shaped like spikes used by some for support
Term
Osculum
Definition
Opening at top; how water gets out
Term
Pore
Definition
Water passes through the pores from the flagella of collar cells.
Term
Mesohyl/mesoglea
Definition
Non-living, jelly-like substance separating the epidermis from the gastrodermis.
Term
Describe the digestive system of a sponge.
Definition
Intracellular digestion; cells break down the food in the collar cells.
Term
Gemmule
Definition

Asexual reproduction:

Internal buds made during harsh conditions; food filled ball of ameobocytes.

Term
Budding
Definition

Asexual reproduction:

A new sponge grows from older ones and eventually breaks off.

Term
Regeneration
Definition

Asexual reproduction:

Missing body parts are regrown.

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