Chapter 32 Flashcards
What are the 6 phylum in the invertebrate part of the animalia kingdom?
- Porifera
- Cnidaria
- Platyhelminthes
- Nematoda
- Annelida
- Mollusca
What are the characteristics of the phylum Porifera? What is an example of it?
Simplest multicellular animals Asymmetrical Use spicules as support No organs, can be dissociated and re form Sexes aren't separate (hermaphroditic) Example: sponge
What are the characteristics of the phylum Cnidaria or Coelenterata? What are two examples of it?
Two General body forms, polyp (upside down jelly fish) and medusa (jellyfish)
All carnivorous
Single opening (mouth and anus)
Tentacles to pull food in
Examples: jellyfish, hydra, coral
What are the characteristics of the phylum Platyhelminthes? What are examples of this?
Simplest animals showing bilateral chemistry
Head and tail regions
Plat- flat worms
Examples: planaria, tapeworm, fluke
What are the three classes in the Platyhelminthes phylum?
Turbellaria- planaria
Trematoda- fluke
Cestoda- tapeworm
What are the characteristics of the phylum Nematoda? What are some examples of this?
Small size
Two openings mouth and anus
Estimated 100 000 species
Aqua and land
Examples: pinworms, roundworms
What are the characteristics of the phylum Annelida? What are some examples of it?
Body divided into separate sections (segments)
Tube within a tube body plan
Examples: earthworm and leech
What are the three classes within the Annelida phylum?
Oligochaeta - earthworms
Hirudinea- leeches
Polychaeta - sandworms
What are the characteristics of the phylum Mollusca? What are examples of this?
Second largest animal phylum
Aqua and land
Separate sexes (hermaphroditic)
Examples: clam and snail
What are the three classes in the phylum mollusca?
Gastropoda - snails, slugs
Bivalvia - oysters, clams
Cephalopoda - octopus, squid
What is a mesoglea?
Middle layer in the jelly fish body wall
What is the coelom?
Fluid filled Body space or cavity between two tubes
What is the gastrovascular cavity?
Internal body cavity of jellyfish
What does hermaphroditic mean?
Presence of both sexes in the same individual
What is cephalization?
Development of an anterior end
What are proglottids?
Individual segments of tapeworm
What are parapodia?
Extensions that aid movement in sandworms
What are aortic arches?
Hearts
What are cnidoblasts?
Stinging cells
What is the difference between radial and bilateral symmetry?
Radial- line down the central of animal where right angle cross sections to the line show repeating structure
Bilateral- cut an organism into to two only once and it will be the same on both sides
What are nematocysts?
Small fluid filled capsules containing a coiled thread
Found in cnidoblast
What is the pharynx?
A muscular tube that can be extended through the mouth opening for eating in planaria
What is the mantle?
A fold of skin that surrounds the bodies organs
What is the radula?
A rasping, tongue like organ in mollusks
