1 / 14

Phylum Porifera

Phylum Porifera. Table of Contents. General description Sponge canal system Unique characteristics Systems (integument, skeletal, muscle, digestive) Systems (respiratory, circulatory, nervous) Systems (endocrine and reproductive) Taxonomy Calcispongiae Hyalospongiae Demospongiae.

shamara
Download Presentation

Phylum Porifera

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Phylum Porifera

  2. Table of Contents • General description • Sponge canal system • Unique characteristics • Systems (integument, skeletal, muscle, digestive) • Systems (respiratory, circulatory, nervous) • Systems (endocrine and reproductive) • Taxonomy • Calcispongiae • Hyalospongiae • Demospongiae

  3. Phylum Porifera (por-if-er-a) • Grouped as Parazoans - multicellular animals with no well-defined tissue. • They are sessile, and asymmetrical (sometimes with radial symmetry). Body organized around a system of water canals and chambers

  4. Sponge Canal Systems • The body plans or structures are based on complexity of water-canal and skeletal system • Asconoid • Choanocytes line the spongocoel • Syconoid • Choanocytes are in radial canals off spongocoel • Leuconoid • Choanocytes are in chambers off of the radial canals.

  5. Some unique characteristics • Spicules • Choanocytes (collar cells) • No true tissue • Pores • Body plans (asconoid, syconoid, leuconoid)

  6. Porifera Systems • Integumentary • Pinacocytes - thin flat layer of T-shaped cells • Skeletal • Spicules and spongin(forms of collagen) • Muscle • Movement cellular by flagella and pseudopodia • Digestive • Intracellular; use choanocytes to trap food.

  7. Porifera Systems • Excretory • Marine are isotonic, freshwater forms use contractile vacuoles. • Respiratory • diffusion by individual cells • Circulatory • Choanocytes create current, ameboid cells transport food • Nervous • Cell irritability shown by individual cells

  8. Porifera Systems • Endocrine • endocrine like chemical present within individual cells • Reproductive • External fertilization, or sperm brought in choanocytes and fertilization occurs in chambers. • Asexual: regenerate whole sponge from a few spicules, choanocytes and amoeboid cells. • Gemmulesin freshwater sponge (a few marine ones)

  9. Spongin Gemmule Arrow pointing to spicule Spicules

  10. Porifera Taxonomy • Class: Calcispongiae (cal-si-spon-ge-a) • Scypha (Grantia or Sycon) • Leucosolenia • Class: Hyalospongiae(hi-a-lo-spon-ge-a) • Euplectella • Class: Demospongiae(dem-o-spon-ge-a) • Euspongia (Spongia) • Spongilla • Class: Sclerospongiae (skler-o--spon-ge-a) • No specimens

  11. Taxonomy Leucosolenia (stained) Grantia (Scypha) Spicules Class Calcispongiae • Spicules of calcium carbonate (all three canal systems present in class)

  12. Class Hyalospongiae • Six-rayed silicon spicules Euplectella (Venus’ flower basket)

  13. Class Demospongiae • Presence of spongin, or silicon spicules (that are not six-rayed) or both. Euspongia (Spongia) Spongilla

  14. End of Phylum Porifera

More Related