Hybrid CD-ROM Single user  $99.95 

Explore the biology and natural history of segmented worms! Learn how earthworms improve soil and why they come to the surface on rainy days. Discover features that annelids share with all animals as well as distinctive characteristics found only in phylum Annelida.

Annelids' interactive overview of the three largest annelid classes teaches students the importance of oligochaetes, the different body plans of polychaetes, and the actual medical uses of leeches.

Topics covered on this program:
Animal characteristics - the importance of annelid segments, symmetry and development in classifying annelids - annelid evolution - annelid anatomy and organ systems involved with the integument, support, movement, digestion, excretion, circulatoin, respiration, and sensation - diversity, feeding and reproduction in the three largest annelid classes - Oligochaeta - Polychaeta - Hirudinea.

Presentation
The Presentation portion of this program includes audio-narrated scenes featuring the content from the objectives.

Interactive Lessons
Students can work through different activities that directly reinforce the information
learned in the Presentation.

Annelids - Program Objectives

I. Introduction

II. Annelids are Animals

A. Characteristics of All Animals

B. Annelid Characteristics, Evolution, and Diversity

1. Segments - Metamerism

2. Symmetry

a. Annelids are Bilaterally Symmetrical

3. Development

a. Protostomes

b. Coelomates

4. Evolution

a.  Segmentation Probably Evolved as an Adaptation for Movement

5. Annelid Diversity - Three Taxonomic Classes

III. Annelid Body Plan & Organ Systems

A. Integument

1. Cuticle & Epidermis

2. Musculature & Setae

B. Support

1. Annelids are Invertebrates

2. Hydrostatic Skeleton

C. Movement

1. Peristalsis

2. Setae Provide Traction

D. Digestion

1. Mouth and Prostomium

a. Food Passing Through the Pharynx, Crop, and Gizzard is Digested or Excreted as Castings

E. Excretion

1. Nephridia

F. Circulation

1. Annelids Have a Closed Circulatory System

2. The Dorsal Vessel Functions as the Heart

G. Respiration

1. Most Annelids Breathe Through Their Skin

2. Earthworms Surface for Oxygen After Rain Storms

H. Sensation

1.  Annelids Possess Both a Central and a Peripheral

Nervous System

2. Motor and Sensory Neurons

3. Nervous Response is an Annelid's Chief Form of Defense

4. Giant Axons Quickly Transmit Impulses

IV. Annelid Classes

A. Oligochaeta

1. Oligochaetes are the Few Long Haired Annelids

2. Oligochate Diversity, Habitat and Feeding Styles

a. Most Oligochaetes are Decomposers

b. Earthworms are the “Intestines of the Soil”

3. Oligochaete Reproduction

a. Hermaphrodites Have Both Male and Female Reproductive Systems

b. Cross-fertilization

4.  Some Oligochaetes Undergo Asexual Reproduction Through Fragmentation

B. Polychaeta

1. Polychaete Diversity and Habitat

2. Polychaete Feeding Styles

3. Polychaetes Have Many Setae Associated with Parapodia

4. The Prostomium is Modified as a Head in Some Polychaetes

5. Motile Polychaetes are Often Predaceous

6. Sedentary Polychaetes are Typically Filter Feeders

7. Polychaete Reproduction

a. Most Polychaetes are Either Male or Female

b. Polychaetes Exhibit Various Reproductive Strategies

c. Development - Trochophore Larvae

8. Polychaete Summary

C. Hirudinea

1. Leech Diversity and Habitat

2.  Body Modifications: Lack of Setae, Grooved Segments, & Modified Coelom

3. Leech Movement

4. Leech Feeding

a. Digestion

5. Stimuli Detection

6. Leech Relatives

7. Leech Evolution and Reproduction

V. Human Use of Annelids

VI Conclusion

		Designed with these features, or to meet the needs of the listed grade levels.

		Contains some of the listed features, or should be appropriate depending on students skill level.

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