About This Chapter
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- Have fallen behind in understanding animal body plans or invertebrates.
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- Start at the beginning, or identify the topics that you need help with.
- Watch and learn from fun videos, reviewing as needed.
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- Test your understanding of each lesson with short quizzes.
- Submit questions to one of our instructors for personalized support if you need extra help.
- Verify you're ready by completing the Invertebrates chapter exam.
Why it works:
- Study Efficiently: Skip what you know, review what you don't.
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Students will review:
In this chapter, you'll learn the answers to questions including:
- How are animal body plans classified?
- What are the primary features found in different types of worms?
- Why are mollusks important to the study of invertebrates?
- What are the different types of arthropods?
- How do insects develop, obtain food and reproduce?
1. Animal Body Plans: Classifications and Features
The Animal Kingdom is diverse and complex. How do we make sense of it all? Scientists use body plans to classify and organize the animals of Earth, making it much easier to differentiate between them.
2. Invertebrates: Definition & Examples
From bees to lobsters and octopi to cockroaches, invertebrates are everywhere. This lesson introduces them as a major group within biology and discusses their relationship with the human race.
3. Ocean Invertebrates: Sponges & Cnidarians
While some may call them simple, sponges and cnidarians have some amazing abilities. This lesson tells the story these ocean invertebrates, ranging from sponges to coral to jellyfish.
4. Worms: Types & Features
You may not know this, but worms are everywhere. Many are so tiny that we can't see them crawling all over the place like we can earthworms. In this lesson, we'll learn about some of the different types of worms around us.
5. Mollusks: Characteristics & Types
Do you like to eat seafood, hunt for seashells, or learn about scary sea creatures? If so, then you'll want to learn about the different types of mollusks, which include the tasty bivalves, the cool-looking gastropods, and the weird cephalopods.
6. Echinoderms: Traits, Types & Roles
After watching this lesson, you'll be well on your way to being an echinoderm expert! For example, you'll learn that sea cucumbers help clean up the ocean floor and that starfish can grow back any arms that are broken or damaged.
7. Arthropods: Definition, Characteristics & Types
Arthropods are the most abundant animals on the planet. They fly, jump, swim, and crawl over just about every inch of the world. Learn about common types of arthropods and the characteristics they have in common.
8. Echinoderm Reproduction & Larvae
Echinoderms are a strictly marine group of invertebrates that include starfish, sea urchins, and sand dollars. Learn about both the asexual and sexual reproduction of different echinoderms.
9. Echinodermata Circulatory System
Learn about the circulatory system of members of the phylum Echinodermata. They have an unusual circulatory system when compared to humans and mammals - an open system with no true heart!
10. Echinodermata Digestive System
Learn about the digestive system of the phylum Echinodermata - invertebrates that include starfish, sea urchins, and sand dollars. They have simple digestive systems when compared to other animals. Learn about what they eat and how they digest it.
11. Echinodermata Nervous System
Learn about the nervous system of the members of the phylum Echinodermata. Members of this invertebrate marine phylum include starfish, sea urchins and sand dollars. Though they lack brains, echinoderms do have a nervous system and sensory organs.
12. Examples of Symmetry in Phylum Platyhelminthes
Almost all creatures in the animal kingdom show some kind of symmetry. Read on to learn what the Platyhelminthes are and what kind of symmetry they exhibit.
13. Phylum Echinodermata: Definition, Characteristics & Examples
Learn about echinoderms, which include starfish and sand dollars, in this lesson. We'll discuss what an echinoderm is, examine what their defining features are, and go over some examples of the five classes that make up the phylum Echinodermata.
14. Phylum Mollusca: Digestive, Nervous & Circulatory Systems
Learn about the animal phylum Mollusca and its most important body systems. Mollusca includes a wide range of common invertebrate species that can inhabit land, freshwater, and saltwater environments, making them an extremely diverse group of organisms.
15. Which Mollusks Have Shells?
Mollusks are a diverse set of creatures that have been around thousands of years. Read this lesson to learn what types of mollusks have shells, the different subcategorizations of shell-carrying mollusks, and how their shells are made.
16. Cnidarian Life Cycle
Cnidarians are a group of aquatic organisms that undergo a two-part life cycle. This lesson describes the Cnidarians, their characteristics, and the detailed (yet fascinating) reproductive process they employ.
17. Cnidaria Nervous System
In this lesson, we'll take a look at the simple and elegant nervous system of the Phylum Cnidaria. Cnidarians include hydras, sea jellies or jellyfish, sea anemones, corals, and box jellies. Their nervous system allows them to sense their environment, move through the water, and capture prey.
18. Gastropod: Definition, Characteristics & Examples
The animal class Gastropoda includes a range of aquatic and land-dwelling animals. Learn about what makes a gastropod a gastropod, and which animals are members of the class.
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Other chapters within the Middle School Life Science: Help and Review course
- Introduction to Life Science: Help and Review
- Characteristics & Chemicals of Life: Help and Review
- The Parts of Cells: Help and Review
- DNA Replication & Mutation: Help and Review
- Cell Division & the Cell Cycle: Help and Review
- How Living Organisms Get Energy: Help and Review
- Classification of Organisms: Help and Review
- The Origin & History of Life On Earth: Help and Review
- Genetics & Hereditary Traits: Help and Review
- Genetic Engineering Basics: Help and Review
- Natural Selection & Evolution in Life Science: Help and Review
- Microbiology & Types of Microbes: Help and Review
- Introduction to Ecosystems: Help and Review
- Types of Ecosystems: Help and Review
- Changing Ecosystems: Help and Review
- Animal Behavior & Communication: Help and Review
- Mammal Reproduction & Development: Help and Review
- The Cardiovascular System: Help and Review
- The Blood Vessels: Help and Review
- The Digestive System: Help and Review
- The Urinary & Endocrine Systems: Help and Review
- The Muscular System: Help and Review
- The Skeletal System & Connective Tissue: Help and Review
- Sight, Hearing & Other Senses: Help and Review
- Health Issues & Concerns: Help and Review
- Plant Biology & Structure: Help and Review
- How Plants Grow & Reproduce: Help and Review
- Environmental Concerns: Help and Review
- Natural Resources: Help and Review
- Growth & Productivity in Economics
- American Labor & Consumer Issues