1. Animal Kingdom How do animal populations differ?

2. Kingdom Animalia  Within the Animal Kingdom there are approximately 35 sub-divisions called “Phyla”; each phylum sub-division shares particular structural and functional properties which together separate it from other phyla.  There are 9 main phyla in the Animal kingdom:

3. Kingdom Animalia  Porifera – These are the salt-water sponges; there are approximately 8,000 separate species existing today.

4. Kingdom Animalia  Porifera – These are the salt-water sponges; there are approximately 8,000 separate species existing today.  Cnidaria- This group is composed of jellyfish, and other lower aquatic animals; approx 15,000 species exist today

5. Kingdom Animalia  Porifera – These are the salt-water sponges; there are approximately 8,000 separate species existing today.  Cnidaria- This group is composed of jellyfish, and other lower aquatic animals; approx 15,000 species exist today  Platyhelminthes – These are the flatworms which inhabit both marine and freshwater habitats; over 15,000 species exist today.

6. Kingdom Animalia  Porifera – These are the salt-water sponges; there are approximately 8,000 separate species existing today.  Cnidaria- This group is composed of jellyfish, and other lower aquatic animals; approx 15,000 species exist today  Platyhelminthes – These are the flatworms which inhabit both marine and freshwater habitats; over 15,000 species exist today.  Nematodes – This phylum consists mainly of about 80,000 known parasitic worms.

7.  Mollusca – This major group consists of snails, clams, squid, and octopus; there are over 110,000 known species.

8.  Annelida – About 15,000 individual segmented worms comprise this phylum; the common earthworm is an example. .

9.  Mollusca – This major group consists of snails, clams, squid, and octopus; there are over 110,000 known species.  Annelida – About 15,000 individual segmented worms comprise this phylum; the common earthworm is an example.  Arthropoda – This very large group consists of insects; it is estimated that there are over 1 million species of insects existing today.

10.  Echinodermata – These are the marine starfish; about 6,000 species exist today.

11.  Chordata – This is a group of animals which are classified on the basis of possessing 3 common embryological features – dorsal nerve cord, supportive structure called the notocord, and pharyngeal gill pouches. Within this phylum is a highly-advanced group called the `vertebrates' which include fish, amphibians, reptiles, birds, and mammals; it is this phylum to which the human organism belongs.

13. Phylum Porifera - Sponges  Structure –Bodies of sponges are supported by a network of spikes. –Has pores

14. Phylum Porifera - Sponges  Reproduction –Asexually by budding –Sexually  Sponges do not have separate sexes but a single sponge produces eggs at one time of the year and sperm at a different time.

15. Phylum Porifera - Sponges  Getting Food and Oxygen from Water –Feed by straining food particles from water –Oxygen from the water moves into the sponges cells –Move reproductive cells