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Content Standard III-3, part 1- Invertebrates

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Content Standard 11- Animal Characteristics- Invertebrates

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1 Content Standard III-3, part 1- Invertebrates
Science AHSGE Content Standard III-3, part 1- Invertebrates

2 The Animal Kingdom Multicellular with true tissues
Specialized eukaryotic cells Muscular/nervous systems unique to animals Have their own means of locomotion Consumers- ingest food 1,326,239 classified species 9,812,298 total species

3 Invertebrate vs. Vertebrate
Invertebrates- Animals lacking a backbone Phylum Porifera Phylum Cnidaria/Coelenterata Phylum Nematoda Phylum Platyhelminthes Phylum Annelida Phylum Mollusca Phylum Echinodermata Phylum Arthropoda Vertebrates- Animals with a true backbone Phylum Chordata Classes Agnatha, Osteichthyes, and Chondrichthyes Class Amphibia Class Reptilia Class Aves Class Mammalia


5 PHYLUM PORIFERA Sponges Asymmetrical- no symmetry
Covered with tiny openings, or pores, called ostia Larger openings are called oscula Sponges are sessile Bodies completely lack symmetry Skeleton made of spicules (endoskeleton) Asexual reproduction (budding);Internal fertilization (sexual)

6 Phylum Porifera

7 Phylum Cnidaria/Coelenterata
This phylum includes: Jellyfish Hydra Coral (Calcium carbonate exoskeleton) Characteristics: Radial symmetry Medusa- Free-floating, umbrella-shaped body (Lack skeleton) Polyp- Sessile, tube-like body Tentacles- Arm-like projections covered in stinging cells (cnidocytes/nematocysts) Asexual rep. (budding);External fertilization (Sexual)

8 Phylum Cnidaria/Coelenterata
Hydra (Top) Jellyfish (Bottom)

9 Phylum Cnidaria/Coelenterata

10 Phylum Platyhelmithes
Flatworms Liver Flukes, Planaria and tapeworms Marine flatworms Characteristics: Ribbon-like bodies Bilateral symmetry Branched digestive system No skeleton Asexual (fission); Hermaphrodites (sexual) Free movement Skin breathing

11 Phylum Platyhelmithes
Tapeworm Planaria

12 Phylum Platyhelminthes
Liver fluke

13 Phylum Platyhelminthes
Marine flatworm

14 Phylum Nematoda Roundworms Ascaris, Trichinella and hookworms
Characteristics: Flattened bodies Bilateral symmetry Many are parasites Fluid-filled body cavity called a pseudocoelem Digestive tube No skeleton Sexual reproduction (Internal fertilization) Free movement Skin breathinig

15 Phylum Nematoda Ascaris Trichinella

16 Trichinosis Trichinella spiralis is found in pork
Trichinosis is a disease caused by the Trichinella worm. Eggs hatch in the host’s gut Symptoms: Diarrhea Fever Muscle pain Death

17 Hookworms Hookworms attach to the inside of the digestive tract
Often found in pets Hookworms

18 Phylum Annelida Segmented worms Crop and gizzard digestion
Bilateral symmetry Internal fertilization (sexual) Hydrostatic endoskeleton Muscular movement Skin breathing Leeches Used to be used in medicine to clean blood Earthworms Benefits: Aerate the soil Provide nutrients to the soil

19 Phylum Annelida Earthworm Leech

20 Phylum Annelida Marine segmented worm

21 Phylum Echinodermata Marine animals Radial symmetry
Endoskeleton of ossicles Water-vascular system for movement Spicules- spike-like projections Tube feet- suction cups External fertilization (sexual)

22 Phylum Echinodermata Types of Echinoderms: Sand dollars Sea urchins
Sea cucumbers Sea stars (starfish)

23 Phylum Echinodermata Sea Urchin Sea star (starfish)

24 Phylum Echinodermata Sand dollar Sea cucumber

25 Phylum Mollusca Soft-bodied animals Bilateral symmetry
Visceral mass- Central mass containing organs Mantle- Outer layer of the body No skeleton Radula- Tongue-like organ Foot (Pseudopodium)- Used for locomotion Many have a shell to protect the soft body Univalve- One-part shell Bivalve- Two-part shell Sexual (external and internal fertilization)

26 Phylum Mollusca Types of Molluscs Oysters Clams Mussells Snails
Octopus Squid

27 Phylum Mollusca Oysters Clams

28 Mussells Phylum Mollusca

29 Phylum Mollusca Snail Octopus Ink- chemical defense

30 Phylum Mollusca Squid

31 Phylum Arthropoda Animals with: Exoskeleton Bilateral symmetry
Jointed legs- Bendable Compound eyes- Many lenses Molting- shedding exoskeleton to grow Malpighian tubules: function much like kidneys/silk Segmented bodies Head Thorax Abdomen Cephalothorax- fused head and thorax External and internal fertilization

32 Phylum Arthropoda Class Crustacea- Five pairs of legs
Class Insecta- Three pairs of legs Class Arachnida- Four pairs of legs Class Chilopoda- One pair of legs per segment Class Diploda- Two pair of legs per segment

33 Class Crustacea Barnacle Alaskan King Crab

34 Class Crustacea Lobster Shrimp

35 Class Crustacea Crawfish Crayfish

36 Class Insecta Ant Cricket

37 Class Insecta Grasshopper Societal insects(Hierarchy):
Ants, bees, wasps, hornets, and termites Division of labor Castes- Roles played by individuals

38 Class Insecta Left- Fly Right- Hornet

39 Metamorphosis Complete metamorphosis- Adult lays eggs, eggs hatch into a larvae, larvae develops into a pupa and surrounds itself with a chrysalis/cocoon and emerges as an adult Incomplete metamorphosis- Eggs hatch into a nymph and grow into an adult.

40 Class Arachnida Black widow House spider

41 Class Arachnida Brown recluse Brown recluse bite

42 Class Arachnida Scorpion

43 Class Chilopoda Centipede

44 Class Diploda Millipede

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