Presentation is loading. Please wait.

Presentation is loading. Please wait.

Sponges Phylum Porifera. Phylum Porifera – Pore Bearers Water flow Choanocyte Spicule Pore cell Pore Epidermal cell Archaeocyte Osculum Central cavity.

Similar presentations


Presentation on theme: "Sponges Phylum Porifera. Phylum Porifera – Pore Bearers Water flow Choanocyte Spicule Pore cell Pore Epidermal cell Archaeocyte Osculum Central cavity."— Presentation transcript:

1 Sponges Phylum Porifera

2 Phylum Porifera – Pore Bearers Water flow Choanocyte Spicule Pore cell Pore Epidermal cell Archaeocyte Osculum Central cavity Pores

3 Groups of specialized cells, do not form true tissues or organs Sessile-attached to surface Pores allow water/plankton to circulate (suspension/filter-feeders) Asymmetry Choanocytes – collar cells that pump water in with flagella, create currents and trap food particles Osculum – large opening for water to exit Feeding, circulation, excretion, respiration Simple skeleton –Spicules – transparent support structures made of calcium carbonate/silica –Spongin - protein –Amebocytes – mobile cells to secrete spicules and spongin

4 Feeding Suspension/Filter feeders-actively filtering food particles Intracellular digestion Choanocytes trap food/pass it on Amebocytes – complete digestion by transporting and storing food particles

5 Respiration, Feeding, Excretion Water circulation diffusion Response Lacks nervous system Produce toxins

6 Sexual Reproduction and Life Cycle Sperm from a sponge are released into the surrounding water-Spawning. Water currents carry the sperm to other sponges. Sperm enter another sponge through pores. The sperm are carried to eggs inside the body wall. Sperm fertilize eggs. The zygote develops into a free-swimming larva. Water currents carry the larva until it attaches to a surface and grows into a new sponge. Sperm (N) Egg (N) Larva (2N) Mature sponge Metamorphosis (2N) Swimming larva New sponge Haploid (N) Diploid (2N) FERTILIZATION MEIOSIS

7 Reproduction – Cont. Sexual Reproduction Gametes-sex cells developed from certain amebocytes (most sponges can produce both) Asexual Reproduction Budding-branches or buds break off and grow into separate sponges identical to parent

8 Types of Sponges Encrusting-form thin growths on rocks/dead coral (sometimes bright colors)

9 Red bearded sponge

10 Glass-anchored in deep-water sediments, lace-like skeleton of fused spicules (ex. Venus Flower Basket)

11 Boring-bore thin channels through calcium carbonate shells such as oysters and coral

12 Coralline/Sclero-calcium carbonate skeleton with spicules and spongin form under its body (first known as fossils)

13 Ecology Symbiotic relationships with bacteria, algae, protists Habitats


Download ppt "Sponges Phylum Porifera. Phylum Porifera – Pore Bearers Water flow Choanocyte Spicule Pore cell Pore Epidermal cell Archaeocyte Osculum Central cavity."

Similar presentations


Ads by Google