1. Lesson 10.1: Sponges *Refer to Chapter 5 in your Textbook Tube Sponge
(Callyspongia vaginalis)
Vase Sponge
(Ircinia campana)

2. Learning Goals: I can label the anatomy of a sea sponge.
I can differentiate between the types of sea sponges.
I can explain the various ways sponges can reproduce.
I can describe natural & human uses of a sea sponge.

3. What is an animal? Multicelluar Eukaryotic Cannot produce
their own food
Heterotrophic!
Invertebrate: lacks vertebral column (backbone)
Vertebrate: posses a vertebral column

4. Phylum Porifera = Sponges
Types based on skeletal structure:
Calcareous: spicules made of calcium carbonate or chalk
Siliceous: spicules made of silica or glass
Spongin: no spicules, support structures made of protein fiber (primarily used in commercial use)

5. Variety of Shapes & Sizes of Sponges:

6. Sponge Characteristics:
Simplest invertebrates in the ocean
Lack tissues, organs, & systems
Asymmetrical (no symmetry)
Generally found in warm, clear, shallow
waters (tropical)
Help contribute to coral reefs & provide
habitat
Sessile = attached to a permanent surface

7. Sponge Structure: Ostia: small incurrent pore
Osculum: large excurrent pore
Spongocoel: central body cavity
Choanocytes (collar cells):
trap food
Spicules: support structures

9. Sponge Feeding: Filter feeders: 1.) Suck in water & plankton
through the ostia
2.) Plankton gets trapped by
the collar cells
3.) Water exits through the
osculum

10. Sponge Reproduction: Asexual:
Budding: cells on the outer surface of a sponge develop into a new sponge, once it reaches certain size it drops off from parent
Fragmentation: a piece of sponge breaks off to become a new sponge
Sexual: hermaphrodite, release eggs and sperm during spawning, larva settle and develop into sponges

11. Sponge Reproduction:

12. Sponge Ecological Roles:
Recycle calcium
Habitats for smaller organisms
Symbiotic relationships
Human Use:
Takes about 5 yrs to reach marketable size
5 inches = $10
Bath purposes
Artwork