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ANIMAL KINGDOM - THE INVERTEBRATES E. PHYLUM ANNELIDA

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ANIMAL KINGDOM - THE INVERTEBRATES E. PHYLUM ANNELIDA Segmented Worms F. PHYLUM MOLLUSCA Soft Body G. PHYLUM ARTHROPODA Jointed foot H. PHYLUM ... – PowerPoint PPT presentation

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Title: ANIMAL KINGDOM - THE INVERTEBRATES E. PHYLUM ANNELIDA


1
Figure 33.0 Ochre sea stars, Pisaster ochraceus
ANIMAL KINGDOM - THE INVERTEBRATES
2
I. BASIC CHARACTERISTICS OF ANIMALS
  • Characteristics
  • All are multicellular heterotrophs
  • Cells are supported by collagen
  • Diploid and usually reproduce sexually
  • Most have HOX genes (homeotic genes that control
    development)

3
I. BASIC CHARACTERISTICS OF ANIMALS
  • B. Symmetry
  • asymmetrical no symmetry
  • radial symmetry have body parts arranged in a
    circle around an axis
  • bilateral symmetry can be divided equally along
    only one plane, splits animal into mirror-image
    sides
  • Most have distinct head/tail, belly/back

4
Symmetry
5
I. BASIC CHARACTERISTICS OF ANIMALS
  • C. Directions
  • dorsal (back)
  • ventral (belly)
  • anterior (head)
  • posterior (tail)

6
1. BASIC CHARACTERISTICS OF ANIMALS
  • D. Development
  • 1. Cleavage 8 cell cleavage
  • 2. Morphogenesis
  • 3. Neuralation
  • Protostomes (mouth is formed first, anus second)
    vs. Deuterostomes

7
1. BASIC CHARACTERISTICS OF ANIMALS
  • F. Body Plans
  • acoelomate fluid filled space with no muscle
  • pseudocoelom fluid filled space that is not
    completely surrounded by muscle (roundworms)
  • coelom a fluid filled space that is completely
    surrounded by muscle (earthworms)
  • acts as a hydrostatic skeleton (like a water
    balloon)

8
I. BASIC CHARACTERISTICS OF ANIMALS
  • F. Body Plans
  • acoelomate pseudocoelom coelom

9
I. BASIC CHARACTERISTICS OF ANIMALS
  • F. Animal Protection Support
  • Exoskeleton
  • Endoskeleton
  • G. Two major groups of animals
  • Invertebrates
  • Vertebrates

10
II. CLASSIFICATION OF ANIMALS - MAJOR PHYLA
  • A. PHYLUM PORIFERA
  • Pore-bearers

11
Figure 33.2 Sponges
12
Figure 33.3 Anatomy of a sponge
13
II. CLASSIFICATION OF ANIMALS - MAJOR PHYLA
  • B. PHYLUM CNIDARIA
  • Stinging

14
Table 33.1 Classes of Phylum Cnidaria
15
Figure 33.6 Cnidarians Hydrozoans (top left),
jelly (top right), sea anemone (bottom left),
coral polyps (bottom right)
16
Figure 33.4 Polyp and medusa forms of cnidarians
17
Figure 33.4bx Jelly medusa
18
Figure 33.5 A cnidocyte of a hydra
19
Figure 33.6bx Purple striped jelly, Pelagia
panopyra
20
Figure 33.6cx Sea anemones
21
Figure 33.6dx Coral polyps
22
Figure 33.7 The life cycle of the hydrozoan
Obelia (Layer 3)
23
Figure 33.8 A ctenophore, or comb jelly
24
Figure 33.8x2 Ctenophore
25
II. CLASSIFICATION OF ANIMALS - MAJOR PHYLA
  • C. PHYLUM PLATYHELMINTHES
  • Flatworms

26
Table 33.2 Classes of Phylum Platyhelminthes
27
Figure 33.9x A flatworm
28
Figure 33.10 Anatomy of a planarian
29
Figure 33.11 The life history of a blood fluke,
Schistosoma mansoni
30
Figure 33.12 Anatomy of a tapeworm
31
Figure 33.13 A rotifer
32
Figure 33.14 Lophophorates Bryozoan (left),
brachiopod (right)
33
II. CLASSIFICATION OF ANIMALS - MAJOR PHYLA
  • D. PHYLUM NEMATODA
  • Roundworms

34
Figure 33.25a Free-living nematode
35
Figure 33.25ax Nematode, C. elegans
36
Figure 33.25b Parasite nematode, Trichinella
spiralis
37
II. CLASSIFICATION OF ANIMALS - MAJOR PHYLA
  • E. PHYLUM ANNELIDA
  • Segmented Worms

38
Table 33.4 Classes of Phylum Annelida
39
Figure 33.24 Annelids, the segmented worms
Polychaete (left), feather-duster worm (middle),
leech (right)
40
Figure 33.23x External anatomy of an earthworm
41
Figure 33.23 Anatomy of an earthworm
42
Figure 33.24cx Christmas-tree worms
43
II. CLASSIFICATION OF ANIMALS - MAJOR PHYLA
  • F. PHYLUM MOLLUSCA
  • Soft Body

44
Table 33.3 Major Classes of Phylum Mollusca
45
Figure 33.19 Gastropods Nudibranchs (top left
and bottom left), terrestrial snail (bottom
left), deer cowrie (bottom right)
46
Figure 33.18x Garden snail
47
Figure 33.20 A bivalve Scallop
48
Figure 33.21 Anatomy of a clam
49
Figure 33.22 Cephalopods Squid (top left and
bottom left), nautilus (top right), octopus
(bottom right)
50
II. CLASSIFICATION OF ANIMALS - MAJOR PHYLA
  • G. PHYLUM ARTHROPODA
  • Jointed foot

51
Table 33.5 Some Major Arthropod Classes
52
Figure 33.26 External anatomy of an arthropod
53
Figure 33.27 A trilobite fossil
54
Figure 33.28 Horseshoe crabs, Limulus polyphemus
55
Figure 33.29 Arachnids Scorpion (left),
honeybee air tube filled with parasitic mites
(right)
56
Figure 33.30x Lycosid spider female with
offspring
57
Figure 33.31a Class Dipolopoda (millipedes)
58
Figure 33.32 Insect flight, dragonfly
59
Figure 33.x1 Insecta beetle
60
Figure 33.33 Anatomy of a grasshopper, an insect
61
Figure 33.34 Metamorphosis of a butterfly
62
Figure 33.35 Crustaceans Lobster (top left),
banded coral shrimp (bottom left), barnacles
(right)
63
II. CLASSIFICATION OF ANIMALS - MAJOR PHYLA
  • H. PHYLUM ECHINODERMATA
  • Spiny-skinned

64
Figure 33.37 Echinoderms Sea star (top left),
brittle star (top right), sea urchin (bottom
left), sea lily (bottom right),
65
Figure 33.37ax Blood star, Hencricia levisuscula
66
Figure 33.38 Anatomy of a sea star
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