BIOL 210B, Dr. Clymer

 

Animals

Five key transitions

            1. Tissues

            2. Symmetry

            3. Body cavity

            4. Development

            5. Segmentation

 

Non-coelomate Invertebrate Phyla

Student Learning Outcomes

  1. Understand how members of each phylum are adapted to their environment and food source, e.g. by body plan.            

(The general body plan description might include symmetry; body cavities; specialized tissues, organs, or organ systems; and structures unique to a phylum.)

  1. Be able to discuss the differences in incomplete and complete digestive systems and advantages of complete digestive systems
  2. Be able to identify special distinguishing characteristics of each major phylum. 

 

Terms

Non-coelomate Invertebrate Phyla

Porifera:

•         choanocytes, amoebocytes

•         Spongocoel

Cnidaria:

•         cnidocytes, nematocysts

•         epidermis, gastrodermis, mesoglea

•         polyp, medusa

Ctenophora

•         catch with colloblast

•         mesoderm, really triploblastic

Platyhelminthes

•         first organ systems

•         flame cells (excretion)

•         eyespots (nervous)

•         free-living Turbellaria (planaria)

•         parasitic Neodermata

(flukes, tapeworms)

 

Pseudocoelomate Invertebrate Phyla

Nematoda

•         alimentary canal

•         hydrostatic skeleton

•         Ecdysis

 

Pseudocoelomate Invertebrate Phyla (cont.)

Rotifera

•         tiny, multicellular

•         anterior cilia crown

•         alimentary canal

•         parthenogenesis

 

Coelomate Invertebrate Phyla

Coelomates have a body design that:

            1. Repositions the body’s fluid

            2. Allows complex tissues/organs to develop

            3. Allows for a larger body size

 

Coeloms evolved multiple times during animal evolution

 

Protostomes

•         Nemertea

•         Mollusca

•         Annelida

•         Bryozoa

•         Brachiopoda

•         Arthropoda

Deuterostomes

•         Echinodermata

 

Student Learning Outcomes

  1. Understand how members of each phylum are adapted to their environment and food source, e.g. by body plan.            

(The general body plan description might include symmetry; body cavities; specialized tissues, organs, or organ systems; and structures unique to a phylum.)

  1. Be able to relate body plans to movement

 

Coelomate Invertebrate Phyla

Terms

Nemertea

•         Closed circulatory system

Mollusca

•         trochophore

•         mantle

•         radula

•         torsion

•         viscera

•         ctenidia

•         nephridia

•         lateral shells (bivalves)

•         siphons

Coelomate Invertebrate Phyla (cont.)

Annelida

•         metanephridium

•         peristalsis

•         segmentation

•         setae

•         clitellum

Bryozoa

•         lophophore

•         colonial, u-shapes alimentary canal

•         zoecium

Brachiopoda

•         lophophore

•         solitary

•         dorsal/ventral shells