Ch 51: Ascaris & Pheretima

About This Chapter

Learn about ascaris and pheretima, including their life cycle and characteristics. These brief lessons and quizzes can help you prepare for an exam or assess your understanding of the topics covered.

Ascaris & Pheretima - Chapter Summary

In this chapter on ascaris and pheretima, brief video lessons cover topics such as the life cycle of ascaris lumbricoides and classes of phylum annelida. You'll also learn about one of the species-rich phyla in the animal kingdom. After completing the chapter, you should be able to do the following:

  • List characteristics of phylum nematoda
  • Explain how ascaris lumbricoides spread
  • Differentiate between male and female ascaris worms
  • Describe the symptoms of ascaris lumbricoides
  • Provide examples of phylum annelida
  • Discuss the economic importance of pheretima posthuma

Our expert instructors provide helpful examples in each lesson to assist you with grasping the concepts presented. A multiple-choice quiz is available to test your knowledge after each lesson, and the quizzes can be printed for use as offline worksheets. The quizzes link back to specific topics in the video, so if you get a question wrong you can quickly review that topic.

6 Lessons in Chapter 51: Ascaris & Pheretima
Test your knowledge with a 30-question chapter practice test
Phylum Nematoda: Classes, Characteristics & Examples

1. Phylum Nematoda: Classes, Characteristics & Examples

With 25,000 species discovered and an estimated 900,000 waiting to be discovered, phylum Nematoda is one the most species-rich phyla in the animal kingdom. This lesson discusses this and many other interesting facts about these tiny worms.

Life Cycle of the Ascaris Lumbricoides

2. Life Cycle of the Ascaris Lumbricoides

Ascaris lumbricoides is a type of parasite that can infect humans. Like many parasites, they have a fascinating life cycle. In this lesson, learn how they spread, how they grow, and what effect they can have on humans.

Comparing Male & Female Ascaris Worms

3. Comparing Male & Female Ascaris Worms

In this lesson, we'll learn about the external and internal biological differences between male and female Ascaris worms. This information will help us determine the sex of an Ascaris worm when asked to dissect one in a zoology, biology, or general science course.

Ascaris Lumbricoides: Symptoms & Treatment

4. Ascaris Lumbricoides: Symptoms & Treatment

Ascariasis is an infection caused by the parasitic roundworms Ascaris lumbricoides. Read this lesson to learn what the symptoms of an infection are and how it can be treated.

Phylum Annelida: Characteristics, Classes & Examples

5. Phylum Annelida: Characteristics, Classes & Examples

Phylum Annelida contains a variety of worms and their relatives. They are found everywhere from marine and freshwater habitats to damp soil. Learn more about annelids here and take a short quiz.

Pheretima Posthuma: Bionomics & Economic Importance

6. Pheretima Posthuma: Bionomics & Economic Importance

Pheretima Posthuma is a species of earthworm that is beneficial to the environment and is economically important. In this lesson, we will discuss the bionomic and economic factors associated with Pheretima Posthuma.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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