Animal Kingdom How do animal populations differ?

Animal KingdomAnimal Kingdom

How do animal populations differ?How do animal populations differ?

Kingdom AnimaliaKingdom Animalia

Within the Animal Kingdom there are Within the Animal Kingdom there are approximately 35 sub-divisions called approximately 35 sub-divisions called “Phyla”; each phylum sub-division shares “Phyla”; each phylum sub-division shares particular structural and functional properties particular structural and functional properties which together separate it from other phyla. which together separate it from other phyla.

There are 9 main phyla in the Animal There are 9 main phyla in the Animal kingdom:kingdom:

Kingdom AnimaliaKingdom Animalia PoriferaPorifera – These are the salt-water – These are the salt-water

sponges; there are approximately 8,000 sponges; there are approximately 8,000 separate species existing today. separate species existing today.



CnidariaCnidaria- This group is composed of - This group is composed of jellyfish, and other lower aquatic animals; jellyfish, and other lower aquatic animals; approx 15,000 species exist today approx 15,000 species exist today




PlatyhelminthesPlatyhelminthes – These are the flatworms – These are the flatworms which inhabit both marine and freshwater which inhabit both marine and freshwater habitats; over 15,000 species exist today. habitats; over 15,000 species exist today.




PlatyhelminthesPlatyhelminthes – These are the flatworms – These are the flatworms which inhabit both marine and freshwater which inhabit both marine and freshwater habitats; over 15,000 species exist today. habitats; over 15,000 species exist today.

NematodesNematodes – This phylum consists mainly – This phylum consists mainly of about 80,000 known parasitic worms. of about 80,000 known parasitic worms.

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

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

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

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

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

ArthropodaArthropoda – This very large group consists of – This very large group consists of insects; it is estimated that there are over 1 million insects; it is estimated that there are over 1 million species of insects existing today. species of insects existing today.

EchinodermataEchinodermata – These are the marine – These are the marine starfish; about 6,000 species exist today. starfish; about 6,000 species exist today.

EchinodermataEchinodermata – These are the marine starfish; – These are the marine starfish; about 6,000 species exist today. about 6,000 species exist today.

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

Phylum Porifera - SpongesPhylum Porifera - Sponges

StructureStructure–Bodies of sponges are supported by Bodies of sponges are supported by

a network of spikes.a network of spikes.–Has poresHas pores


ReproductionReproduction– Asexually by buddingAsexually by budding– SexuallySexually

Sponges do not have separate sexes Sponges do not have separate sexes but a single sponge produces eggs at but a single sponge produces eggs at one time of the year and sperm at a one time of the year and sperm at a different time.different time.


Getting Food and Oxygen from WaterGetting Food and Oxygen from Water– Feed by straining food particles from waterFeed by straining food particles from water– Oxygen from the water moves into the sponges Oxygen from the water moves into the sponges

cellscells– Move reproductive cellsMove reproductive cells

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Animal Kingdom How do animal populations differ?