PORIFERAThe Sponges ZOOLOGY Southern Boone County HS Bill

PORIFERA-The Sponges ZOOLOGY Southern Boone County HS Bill Palmer 1

PORIFERA-The Sponges How are they classified? What do they look like? How do they support themselves and move? How do they feed and digest? How do they maintain homeostasis? How do they reproduce and develop? 2

PORIFERA-The Sponges Cells change form and function and they are mobile throughout the body. 3

PORIFERA-The Sponges QUESTIONS: Are any sponges green? What does this imply? 4

PORIFERA-The Sponges Approximately 9000 species encrusting and upright marine, intertidal, freshwater 5

PORIFERA-The Sponges Factoid: A group of sponges is a sleeze. 6

PORIFERA-The Sponges Factoid: If a sponge is placed in a blender and ground up and then the stuff is put into sea water, the cells will reassemble into a sponge. 7

PORIFERA-The Sponges Factoid: If two sponges are blended in the blender and then put into sea water, the cells will reassemble into the original two sponges. 8

PORIFERA-The Sponges • There are 3 classes of SPONGES based on material in spicules. – Class Calcarea – Class Hexactinellida – Class Dermospongiae 9

How do sponges support themselves? Spicules 10

PORIFERA-The Sponges Class Calcarea Spicules composed of calcium carbonate. Exclusively marine. Considered the most primitive of sponges. Color usually dull. 11

PORIFERA-The Sponges Grantia is a freshwater sponge. Class Calcarea 12

PORIFERA-The Sponges Class Hexactinellida “Glass Sponges” Siliceous, six-rayed spicules of hydrated Silicon Dioxide. GLASS!!! Exclusively marine, found in deep water. 13

PORIFERA-The Sponges Class Dermospongiae Spicules or organic collagen network. Marine and freshwater. Occur at all depths. These sponges make the best Bath Sponges. 14

PORIFERA-The Sponges Porifera: What do sponges look like? WATER SYSTEM Water is pumped through the sponge such that O 2 and nutrients are brought in and CO 2 and wastes are removed. 15

PORIFERA-The Sponges WATER SYSTEM Sponge walls have pores and chambers so each cell is in close proximity to water. 16

PORIFERA-The Sponges Body structure Layers of cells with specific functions. Contribute to aquiferous system, food uptake, and support. many types of amoeboid cells. 17

PORIFERA-The Sponges Body structure Outer layer perforated with small holes where water enters. 18

Wrap-ups • • • 1. How are sponges classified? 2. What do sponges look like? 3. How do sponges support themselves 4. How do sponges move? 5. How do sponges feed and digest? 6. How do sponges maintain homeostasis? 7. How do sponges reproduce and develop? 8. Dissect Grantia following directions. 9. Label Sponge Anatomy WS. 10. What ecological role do sponges play? 11. What value are sponges to humans? 12. How do you know that sponges are animals? 19