Invertebrates
Mr. Skirbst
Kingdom Animalia
Animals
- multicellular heterotrophs
whose cells lack cell walls
2 Major Divisions
2 Major Divisions
1- Invertebrates (no backbone)
2 Major Divisions
1- Invertebrates (no backbone)
2- Vertebrates (backbone)
Phylum Porifera
Phylum Porifera
- “pore-bearers” (have many
holes)
- simplest invertebrates
Sponges
- Have many pores
Sponges
- Have many pores
- Show little movement
Sponges
- Have many pores
- Show little movement
- Reproduce sexually &
asexually
Sponges
- Have many pores
- Show little movement
- Reproduce sexually &
asexually
- Cells can “reorganize”
Sponges
- Typical Sponge:
Phylum Cnidaria
Phylum Cnidaria
From the Greek word:“to sting”
Phylum Cnidaria
From the Greek word:“to sting”
- Have nematocysts (stinging
structure)
Phylum Cnidaria
From the Greek word:“to sting”
- Have nematocysts (stinging
structure)
- Have central cavity with one
opening called a
“mouth”
Phylum Cnidaria
From the Greek word:“to sting”
- Have nematocysts (stinging
structure)
- Have central cavity with one
opening called a “mouth”
- Have specialized tissue
2 Body Forms
2 Body Forms
1. Polyp – vase shaped
(ex. hydra, coral, anemone)
2 Body Forms
2. Medusa – bowl-shaped
(ex. jellyfish)
3 Phylum of Worms
3 Phylum of Worms
1.Platyhelminthes
3 Phylum of Worms
1.Platyhelminthes - flat worms
3 Phylum of Worms
1.Platyhelminthes - flat worms
2.Nematoda
3 Phylum of Worms
1.Platyhelminthes - flat worms
2.Nematoda - roundworms
3 Phylum of Worms
1.Platyhelminthes - flat worms
2.Nematoda - roundworms
3. Annelida
3 Phylum of Worms
1.Platyhelminthes - flat worms
2.Nematoda - roundworms
3. Annelida - segmented worms
Phylum Mollusca
1.Bivalve
Phylum Mollusca
1.Bivalve – two shells
Phylum Mollusca
1.Bivalve – two shells
2. Gastropod
Phylum Mollusca
1.Bivalve – two shells
2. Gastropod – stomach foot
Phylum Mollusca
1.Bivalve – two shells
2. Gastropod – stomach foot
3. Cephalopod
Phylum Mollusca
1.Bivalve – two shells
2. Gastropod – stomach foot
3. Cephalopod – head foot
Phylum Echinodermata
Spiny skinned
Phylum Echinodermata
- spiny skinned
Types of Echinoderms
1. Starfish
Types of Echinoderms
1. Starfish
2. Sea Urchin
Types of Echinoderms
1. Starfish
2. Sea Urchin
3. Sea Cucumber
Phylum Arthropoda
Characteristics
1. Exoskeleton
Characteristics
1. Exoskeleton
2. Segmented body
Characteristics
1. Exoskeleton
2. Segmented body
3. Jointed appendages
4 Classes of Arthropods
1.
2.
3.
4.
Crustacean
Myriapods
Arachnids
Insects
4 Classes of Arthropods
1.
2.
3.
4.
Crustacean
Myriapods
Arachnids
Insects
4 Classes of Arthropods
1.
2.
3.
4.
Crustacean
Myriapods
Arachnids
Insects
4 Classes of Arthropods
1.
2.
3.
4.
Crustacean
Myriapods
Arachnids
Insects