2. Phylum Porifera -fera means bearing Pore bearing Sponges Sessile
Mostly marine, some freshwater
~ 10,000 species worldwide

3. Tissue Animals
Tissue is the most complex level of organization. They do not have organs or organ systems

4. Cellular Organelle Molecular Atomic Subatomic
Take Levels of Biology out and put with basic chemistry
Subatomic

5. Organism Organ System Organ Tissue Pronghorn Antelope Nervous System
Brain
Tissue
Nervous Tissue

6. Biosphere Ecosystem Community Population Earth’s surface Air Snake
Soil
Ecosystem
Snake
Pronghorns
Bushes
Water
Hawk
Grass
Hawk
Community
Snake
Pronghorns
Population
Herd of Pronghorns

7. Anatomy of a Sponge

8. Anatomy and Physiology
Draw water in through incurrent pores
Expel through large excurrent pore called the osculum
Epidermis- outer cell layer
Mesenchyme- jellylike matrix
Amoebocytes- moving cells, involved in transportation of materials, excretion, and digestion
Spicules- support structures, come in different shapes and different compositions
Collar cells- create current, engulf and partially digest incoming food particles

9. Anatomy of a Sponge

10. ingestion—the intake of food.
digestion– the breaking down of food into sub- stances the animal can use.
assimilation– the absorption of the food for later use as a source of energy or building material.

13. Reproduction Asexual Sexual
Budding- group of cells enlarge, separate, and grow into a new sponge
Regeneration- broken piece grows to new sponge
Sexual
Primarily in spring
Sperm from one sponge enters collar cell of another. Amoebocyte transfers sperm to an ovum located in the mesenchyme. Zygote develops into flagellated larva.