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Invertebrates. Diversity of Animals Porifera Cnidaria Platyhelminthes Nematoda Mollusca Annelida Arthropoda Echinodermata. Diversity of Animals. A. Origin of Animals B. Characteristics C. Classification. A. Origin of Animals.

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slide1
Invertebrates

Diversity of Animals

Porifera

Cnidaria

Platyhelminthes

Nematoda

Mollusca

Annelida

Arthropoda

Echinodermata

slide2
Diversity of Animals

A. Origin of Animals

B. Characteristics

C. Classification

slide3
A. Origin of Animals

1. Animals are believed to have evolved from colonial protozoans called choanoflagellates

slide4
B. Characteristics
  • 1. Eukaryotic
  • 2. Multicellular
    • -specialization
  • 3. Heterotrophic
  • 4. Reproduce sexually and asexually
  • 5. Movement
    • -nervous tissue
    • -muscle tissue
slide5
C. Classification

1. Sponges (Porifera)

2. Stinging Celled (Cnidaria)

3. Flatworms (Platyhelminthes)

4. Roundworms (Nematoda)

5. Soft Bodied (Mollusca)

6. Segmented Worms (Annelida)

7. Jointed Leg (Arthropoda)

8. Spiny Skin (Echinodermata)

9. Vertebrates (Chordata)

slide6
Porifera

A. Diversity

B. Characteristics

C. Classification

D. Habitat

slide7
A. Diversity

1. There are 9,000 known species of sponges

slide8
B. Characteristics

1. Resemble a tube with one opening

2. Lack true tissue

3. Body consists of two layers of cells

4. Reproduce sexually (same individual) or by budding

slide9
C. Classification

1. There are 3 classes of porifera

slide10
D. Habitat

1. Adults are sessile- anchored to the ocean floor

2. Feed on filtered particles (bacteria)

slide11
B. Characteristics

a. outer: protection

b. inner: collar cells

c. between: amoebocytes in jelly-like material

1. Resemble a tube with one opening

2. Lack true tissue

3. Body consists of two layers of cells

slide12
C. Classification

a. calcarea- calcium carbonate

b. demospongia- spongin fibers

c. hexactinellida- calcium carbonate & silica

1. There are 3 classes of porifera

slide13
Cnidaria

A. Diversity

B. Characteristics

C. Classification

D. Habitat

slide14
A. Diversity

1. There are 9,000 known species of stinging celled animals

slide15
B. Characteristics

1. True tissues

2. Radial symmetry

3. Use tentacles with stinging cells to capture prey

4. Food is digested in a gastrovascular cavity

5. Nerve net allows for sensing

slide16
C. Classification

1. There are 3 classes of cnidarians

a. hydrozoa- hydra

b. scyphozoans- jellyfish

c. anthozoans- sea anemones

slide17
D. Habitat

1. Most are slow moving or sessile

2. Found in tropical and temperate waters

a. shallow ocean floors

b. bottoms of ponds

c. drifting in water currents

slide18
B. Characteristics

1. True tissues

2. Radial symmetry

3. Use tentacles with stinging cells to capture prey

slide19
Platyhelminthes

A. Diversity

B. Characteristics

C. Classification

D. Habitat

slide20
A. Diversity

1. There are 20,000 known species of flatworms

slide21
B. Characteristics

1. Three tissue layers

2. Bilateral symmetry

3. Food is digested in a gastrovascular cavity

4. Moves using cilia on ventral side

a. muscles allow twisting and turning

5. Centralized nervous system

a. eye spots detect light

b. side flaps used for smell

slide22
B. Characteristics

1. Three tissue layers

slide23
B. Characteristics

a. endoderm (digestive)

b. mesoderm (muscle)

c. ectoderm (skin)

1. Three tissue layers

slide24
B. Characteristics

1. Three tissue layers

slide25
B. Characteristics

a. anterior (head)

b. posterior (tail)

c. dorsal (back)

d. ventral (belly)

1. Three tissue layers

slide26
C. Classification

1. There are 3 classes of platyhelminthes

a. turbellaria- planarians

b. trematoda- flukes

c. cestoidea- tapeworms

slide28
Nematoda

A. Diversity

B. Characteristics

C. Classification

D. Habitat

slide29
A. Diversity

1. There are 15,,000 known species of roundworms

slide32
C. Classification

1. There are 2 classes of nematoda

a. secernentea-

b. adenophorea-

slide33
Mollusca

A. Diversity

B. Characteristics

C. Classification

D. Habitat

slide34
A. Diversity

1. There are 150,000 known species of soft bodied animals

slide35
B. Characteristics
  • Muscular foot
  • Mantle
  • Visceral mass which contains most of the internal organs
  • Some have shell of calcium carbonate
  • Sessile(clams), slow moving (snails)or predators (squid)
  • Complete digestive tract.
  • Coelom
  • Feathery gills or lungs
  • Nephridia
  • Nervous system-simple to complex
slide36
C. Classification
  • Gastropoda- snails, slugs,nudibranch
  • Bivalvia-clams,oysters, scallops
  • Cephalopoda- cuttlefish, squid, nautilus, octopus
slide37
Annelida

A. Diversity

B. Characteristics

C. Classification

D. Habitat

slide38
A. Diversity

1. There are 15,000 known species of segmented worms

slide40
B. Characteristics
  • Segmentation
  • Coloem divided in compartments-allows for independent movement of segments
  • Setae
  • parapodia
slide41
Classes
  • Oligochaeta- earthworm
  • Polychaeta-bristle worm
  • Hirudinea-leech
slide42
Earthworm
  • Digestion-esophagus to crop to gizzard
  • Circulation-closed system with aortic arches.
  • Respiratory-diffusion
  • Excretion-nephridia
  • Nervous- ganglia
  • Rerpoduction-hermaphrodite
    • Clitellum
slide43
D. Habitat
  • Soil-oligochaeta
  • Freshwater-oligochaeta, hirudea
  • Marine-polychaeta
  • Moist vegetation-hirudea
slide44
Arthropoda

A. Diversity

B. Characteristics

C. Classification

D. Habitat

slide45
A. Diversity

1. There are 1,000,000 known species of jointed leg animals

slide46
B. Characteristics
  • Segmented
  • Appendages
  • Exoskeleton
  • Compound eyes
  • Antenna
  • Ventral nerve cord
  • Open circulatory system
  • Molting
slide47
C. Classification

1. Arthropods are classified into 4 classes

a. crustaceans

b. arachnids

c. insects

d. myriapods

slide48
2. Crustaceans include decapods (lobsters, crabs, & shrimp)
  • 2 pr appendages on head
  • 2pr appendages/segment
  • Gills
  • Larva-nauplius
  • Tiny (copepods) to very large (Japanese spider crab)
  • Barnacles-sessile
  • isopods
slide49
3. Arachnids
  • Spiders, mites, ticks
  • Cephalothorax
  • 6 pr jointed appendages
    • 1 pr chelicerae
    • 1 pr pedipalps
    • 4 pr walking legs
slide50
4. Insects
  • Segmented body, jointed appendages, exoskeleton
  • Subphylum Uniramia
  • Head, thorax, abdomen
  • Mandibles & antennae
  • 3prs jointed legs
  • Some 1 or 2 pr wings
slide52
4. Insects
  • -over 700,00 species identified
  • Flight
  • Light sturdy exoskeleton
  • Small: many in an area
  • -Short life span & lots of young
          • -Natural selection
slide53
4. Insects
  • Development-Metamorphosis
  • Incomplete
  • Complete metamorphosis
  • Importance
    • Larvae & adult don’t compete (i.e. mosquitoes)
    • Survive harsh weather (i.e. butterflies, moths)
slide54
5. Myriapods

-milipedes and centipedes

slide55
D. Habitat

1. Everywhere except deep ocean

slide57
Echinodermata

A. Diversity

B. Characteristics

C. Classification

D. Habitat

slide58
A. Diversity

1. There are 7,000 known species of spiny skinned animals

slide59
B. Characteristics
  • “spiny skin”
  • Bilateral symmetry – larva
  • Pentaradial symmetry-adults
  • Deuterostomes
  • Endoskeleton of ossicles
  • Carnivores
  • Turn stomach inside out through mouth to feed
  • Nerve ring
  • Separate sexes
  • Regeneration
slide61
C. Classification
  • 5 Classes include:
    • Sea lilies and feather stars
    • Basket stars & brittle stars
    • Sea urchins & sand dollars
    • Sea cucumbers
    • Sea stars

Sea star

Brittle star

Sea urchin

Feather star

Sea cucumber

slide62
A. Origin of Animals

1. Animals are believed to have evolved from colonial protozoans called choanoflagellates

slide63
B. Characteristics

1. Eukaryotic

2. Multicellular

3. Heterotrophic

4. Reproduce sexually and asexually

slide64
C. Classification

1. Sponges (Porifera)

2. Stinging Celled (Cnidaria)

3. Flatworms (Platyhelminthes)

4. Roundworms (Nematoda)

5. Soft Bodied (Mollusca)

6. Segmented Worms (Annelida)

7. Jointed Leg (Arthropoda)

8. Spiny Skin (Echinodermata)

9. Vertebrates (Chordata)

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