Sponges

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Author:
Siobhan
ID:
120407
Filename:
Sponges
Updated:
2011-12-09 17:22:02
Tags:
Sponges
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Description:
Sponges
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  1. Characteristics
    of Sponges

    • Calcium carbonate or silica skeleton consisting of spicules
    • Planktonic larvae, sessile adults
    • No body symmetry
    • Cells arranged in a gelatinous matrixwith pores through which water moves
    • Filter feeders
    • Most are marine


    Never Freakin Mind, Peter Can Get it

  2. Sponge
    Form and Function

    • Many small openings for water to enter
    • Larger opening(s)
    • at top for water to exit
    • No mouth or anus
    • Choanocytes line the canals
    • Flagella move water through canals
    • Capture and phagocytize food particles

  3. Generalized
    Sponge Anatomy

    • Specialized cells perform different functions:

    • Amoeboid cells- move around and break down food
    • Collar cells- pump water throughout
    • Epithelial and pore cells- provide opening for pores, line outside, maintain shape

  4. Sponge
    Reproduction

    • Sexual
    • Sperm/eggs released
    • Pulled into another sponge
    • Fertilized eggs are retained until hatching
    • Asexual (BFG- Big Friendly Giant)
    • Budding- new forming on side
    • Fragmentation- break off and new one forms
    • Gemmules- chunk with necessary cells are release in times of stress- like cyst
    • Free-swimming larva- swin/reproduce
  5. Importance of Sponges
    • Medicines- produced chemicals so predators wont want to eat them.
    • Habitat (reef-forming)- for others because they never leave
    • Filtration of seawater
    • Can eat bacteria/microbes that are too small for other animals
    • Food source for marine animals
    • Dolphin nose protector?
    • Does My Hand Feel Funny?

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