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INTRODUCTION TO ANIMALS. Chapter 34. Animal Basics. 4 Defining Characteristics Morphology (animal bodies) Invertebrates versus vertebrates. 4 DEFINING CHARACTERISTICS: 1. eukaryotic, multi-cellular (no cell walls) 2. heterotrophic 3. sexual reproduction and development 4. movement.

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animal basics
Animal Basics
  • 4 Defining Characteristics
  • Morphology (animal bodies)
  • Invertebrates versus vertebrates
slide3

4 DEFINING CHARACTERISTICS:

  • 1. eukaryotic, multi-cellular (no cell walls)
  • 2. heterotrophic
  • 3. sexual reproduction and development
  • 4. movement
morphology
Morphology
  • Symmetry
    • Radial
    • Bilateral
  • Germ Layers
    • Endo, meso and ectoderm
  • Body Cavities
    • aka Coelem
morphology continued
Morphology (continued)
  • A closer look at bilateral body symmetry
    • Anatomy terms
morphology continued6
Morphology (continued)
  • Cephalization – concentration of sensory and brain structures in anterior region
morphology continued7
Morphology (continued)
  • A loser look at germ layers and body cavities
    • Animals are either
      • Acoelomates: no body cavity
      • Pseudocoelomates: false body cavity
      • Coelomates: true body cavity
invertebrates
INVERTEBRATES

Animals without Backbones

1. 2.

3.

4.

5.

review animals
REVIEW: ANIMALS

CHARACTERISTICS:

  • 1.
  • 2.
  • 3.
  • 4.
review animals11
REVIEW: ANIMALS

CHARACTERISTICS:

  • 1. eukaryotic, multi-cellular (no cell walls)
  • 2. heterotrophic
  • 3. sexual reproduction and development
  • 4. movement
porifera
PORIFERA
  • Phylum of _____________
  • Digestion, circulation, excretion, and

gas exchange by ___________________

  • Body support by ____________
  • No tissues
  • Sexual and asexual

reproduction

  • May have evolved from colonial

protists

porifera13
PORIFERA
  • Phylum of sponges
  • Digestion, circulation, excretion, and

gas exchange by amebocytes

  • Body support by spongin
  • No tissues
  • Sexual and asexual

reproduction

  • May have evolved from colonial

protists

cnidarians
CNIDARIANS
  • Jellyfish, coral, Hydra, sea anemone, sea fans
  • Polyp and medusa body forms
  • __________ symmetry
  • Tentacles with _________cells
  • ____________cavity with one

opening for digestion

  • Simple ________ ___ in the outer epidermis to sense the environment
  • Asexual reproduction by ________and sexual reproduction
cnidarians15
CNIDARIANS
  • Jellyfish, coral, Hydra, sea anemone, sea fans
  • Polyp and medusa body forms
  • Radial symmetry
  • Tentacles with stinging cells
  • Gastrovascular cavity with one

opening for digestion

  • Simple nerve net in the outer epidermis to sense the environment
  • Asexual reproduction by budding and sexual reproduction
platyhelminthes
PLATYHELMINTHES
  • Flatworms: planarian, tapeworm, and flukes
  • _____________ symmetry
  • _______________ cavity with 1 opening
  • True muscle tissue
  • Ganglia and ____________ nerve cords
  • Asexual fragmentation and

_____________ and sexual reproduction

  • Gas exchange by _______ through body wall
  • Acoelomate
platyhelminthes18
PLATYHELMINTHES
  • Flatworms: planarian, tapeworm, and flukes
  • Bilateral symmetry
  • Gastrovascular cavity with 1 opening
  • True muscle tissue
  • Ganglia and ventral nerve cords
  • Asexual fragmentation and

regeneration and sexual reproduction

  • Gas exchange by diffusion through body wall
  • Acoelomate
nematoda
NEMATODA
  • Roundworms: hookworm, pinworm,

heartworm, Trichinella, rotifers, soil

nematodes

  • ________ digestive tract with mouth

and anus

  • ________________ which transports

nutrients

  • Gas exchange through _______ body

wall

  • Sexual reproduction
nematoda20
NEMATODA
  • Roundworms: hookworm, pinworm,

heartworm, Trichinella, rotifers, soil

nematodes

  • Complete digestive tract with mouth

and anus

  • Pseudocoelom which transports

nutrients

  • Gas exchange through moist body

wall

  • Sexual reproduction
annelida
ANNELIDA
  • ______________ worms: earthworm, sandworm, and

leech

  • Coelomate
  • ________ circulatory system
  • Many body systems
  • _______ sets of muscles
  • Sexual reproduction; most are ________________
annelida22
ANNELIDA
  • Segmented worms: earthworm, sandworm, and

leech

  • Coelomate
  • Closed circulatory system
  • Many body systems
  • Two sets of muscles
  • Sexual reproduction; most are hermaphrodites
mollusca
Mollusks: snails, sea slugs; bivalves such as clams, scallops, oysters, and mussels; octopus, squid, and

chambered nautilus (cephalopods)

All have a __________ _____ and a

_____ that produces a shell in most species

_________ circulatory system

Gas exchange by _______ in mantle cavity in water forms or mantle cavity serves as a ________ in land forms

MOLLUSCA
mollusca24
Mollusks: snails, sea slugs; bivalves such as clams, scallops, oysters, and mussels; octopus, squid, and

chambered nautilus (cephalopods)

All have a muscular foot and a

mantle that produces a shell in most species

Open circulatory system

Gas exchange by gills in mantle cavity in water forms or mantle cavity serves as a lung in land forms

MOLLUSCA
arthropoda
ARTHROPODA
  • Insects, crustaceans, spiders (Arachnids), centipedes, millipedes
  • ___________of protein and chitin; _____ appendages
  • _________ circulatory system
  • ________________ tubules in insects and

arachnids remove liquid wastes

  • ____________ _______and/or book lungs

in terrestrial forms; gills in aquatic

species for gas exchange

  • _______eyes and antennae in many forms
  • Sexual reproduction with separate sexes and _____________ fertilization
arthropoda26
ARTHROPODA
  • Insects, crustaceans, spiders (Arachnids), centipedes, millipedes
  • Exoskeleton of protein and chitin; jointed appendages
  • Open circulatory system
  • Malpighian tubules in insects and

arachnids remove liquid wastes

  • Tracheal tubes and/or book lungs

in terrestrial forms; gills in aquatic

species for gas exchange

  • Compound eyes and antennae in many forms
  • Sexual reproduction with separate sexes and internal fertilization
slide28

IDENTIFY EACH PICTURE AS TO TYPE OF ARTHROPOD

crustacean

arachnid

centipede

insect

crustacean

millipede

insect

crustacean

arachnid

echinodermata
ECHINODERMATA
  • Besides the chordates, this phylum contains the only invertebrates that are ___________________
  • Examples include sea stars, sand dollar, sea urchin, sea cucumber, sea

lilies, brittle star, sea biscuit

  • _________ skinned animals
  • Unique ________ _________ system
  • Secondary _________ symmetry with no segmentation
echinodermata31
ECHINODERMATA
  • Besides the chordates, this phylum contains the only invertebrates that are deuterostomes
  • Examples include sea stars, sand dollar, sea urchin, sea cucumber, sea

lilies, brittle star, sea biscuit

  • Spiny skinned animals
  • Unique water vascular system
  • Secondary radial symmetry with no segmentation
invertebrates32
INVERTEBRATES

Animals without Backbones

Check your answers from slide 1, then correct any

that were wrong and add the phylum name.

1. 2.

3.

4.

5.

invertebrates33
INVERTEBRATES
  • Invertebrate Web Quest
  • Click on the picture below to begin.
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