About This Chapter
Class Arachnida - Chapter Summary
This comprehensive chapter explores important information about class Arachnida. The chapter's bite-sized lessons show you the types of arachnids that make up this animal class, as well as information regarding arachnid habitats, adaptations, characteristics, diets, organ systems and more. You can work through this chapter at your own pace, and we've included short self-assessment quizzes to help you remember the information you study. Our expert instructors are available to answer any questions you may have, and you can access the chapter at any time using your desktop, laptop, tablet or smartphone. Reviewing this chapter can help you:
- Recognize different types of arachnids
- Interpret facts about sea spiders, whip spiders, ricinulei and thelyphonida
- Understand the concept of ballooning in spiders
- Outline the life cycles of harvestmen, ticks and scorpions
- Explain how arachnids reproduce and adapt
- Describe arachnid respiratory, digestive and circulatory systems
- Identify the features of arachnid habitats, including scorpion, whip spider and tick habitats
- Evaluate the characteristics of acariformes, schizomida and pseudoscorpions
- Tell how many types of ticks exist
- Assess order Araneae and order Palpigradi
- Analyze tick anatomy, diet, reproduction and types
1. Types of Arachnids: Spiders, Scorpions & Mites
In this lesson we'll be diving into the creepy, crawly world of arachnids. From spiders large enough to eat birds to microscopic mites making their home on your skin and hair, there's no shortage of interesting arachnids to explore.
2. What is a Sea Spider? - Facts, Predators & Classification
Although not truly an arachnid, in this lesson we'll be learning about the so-called sea spider. We'll go over some interesting facts about this animal, its true classification, and its place in the ocean food chain.
3. What is Ballooning in Spiders?
In this lesson you will learn how spiders that are invertebrates learn to move to a different location through a process called ballooning, a means of transportation that uses a strand of silk.
4. Harvestmen: Lifespan, Facts & Types
Though often mistaken for their relatives, harvestmen are unique creatures that stand apart from the crowd. In this lesson we'll discuss what harvestmen are, some interesting things to know about them, and the different kinds that exist.
5. Arachnids: Reproduction & Adaptations
The world of arachnid reproduction is a world like no other. This lesson will delve into this bizarre and fascinating world, exploring examples and adaptations.
6. Arachnid Respiratory System: Organs & Structure
Have you ever thought about how arachnids breathe? They are animals, so they need to breathe just like you and me. In this lesson we'll take a look at the organs of the arachnid respiratory system and how they facilitate gas exchange.
7. Arachnid Digestive System & Diet
You've seen ticks on your dog, or spiders busily building a web. But how much do you know about how arachnids digest their food? This lesson will explore the arachnid digestive system as well as their diet.
8. Arachnid Circulatory System
Have you ever wondered how that spider sitting on your deck pumps blood through its body? This lesson will answer all of your arachnid circulatory system questions, and will begin by defining an arachnid and end with the features that make up an arachnid's circulatory system.
9. Arachnid Habitats: Features & Facts
Arachnids are eight-legged arthropods that include spiders and they can be found in an extremely wide variety of habitats. Who else is an arachnid and where do they live? Read on to learn more.
10. Acariformes: Characteristics, Morphology & Taxonomy
Mites are small and versatile creatures that are found just about everywhere on Earth. In this lesson, learn about the characteristics, morphology, and taxonomy of a specific superorder of mites, the Acariformes.
11. Whip Spiders: Facts & Habitat
In this lesson you will learn about whip spiders, which are sometimes called the 'tailless whip scorpion,' and have been found in tropical and sub-tropical regions.
12. Order Araneae: Definition, Characteristics & Life Cycle
Spiders are more than just the creatures you find in your house. In this lesson we'll discuss what spiders are, what they look like, where they live, and their reproduction and life cycle.
13. Order Palpigradi: Phylogeny & Examples
A cousin to spiders, ticks, and mites, members of Palpigradi are also known as the microscorpions. In this lesson, we'll take a closer look at this unique and tiny animal, which unlike its larger cousin the scorpion, poses no threat to you.
14. Ticks: Life Cycle & Reproduction
You probably consider ticks to be annoying pests. However, despite their ability to make your life miserable, ticks are pretty interesting critters. This lesson will examine the life cycle of a tick and then take a closer look at tick reproduction.
15. The Anatomy of a Tick
Ticks are often mistaken for insects because they are bothersome parasites like fleas and mosquitoes. So in this lesson we'll look at the anatomy of a tick, explaining the different body parts to be familiar with.
16. Ticks: Habitat & Diet
If you are curious about ticks, look no further. In this lesson, we cover where ticks live and what they eat. Follow along as we take a close look at this creepy crawler's interesting life.
17. How Many Different Types of Ticks are There?
A tick is a type of arachnid, closely related to the spider. There are two main types of this parasitic creature and many different species. Read on to learn more.
18. Pseudoscorpions: Facts, Habitat & Characteristics
In this lesson, we'll be looking at pseudoscorpions, which are tiny creatures that aren't exactly what their name may suggest. After you learn what they are, where they live, and what they're like, you'll be able to test your knowledge with a quiz!
19. Ricinulei: Reproduction & Facts
Don't be surprised if you haven't heard of the hooded tick spiders. These rare and tiny arachnids are only found in certain places on Earth. In this lesson, we'll look at their characteristics, habitat, and mating.
20. Schizomida: Characteristics & Identification
Schizomida is an order of understudied arachnids. But don't worry, this lesson will explore what we do know about this tiny, strange-looking little organism, including characteristics and how to identify them.
21. Scorpions: Life Cycle & Reproduction
While scorpions may look like an insect, they are not. In fact, there is a lot about the scorpion that makes it pretty unique. This lesson will examine the life cycle, and mating habits of these arachnids.
22. Scorpions: Anatomy & Morphology
Scorpions can be very intimidating looking, especially up close. You will learn all about the general outer anatomy and morphology of scorpions in this lesson.
23. Scorpions: Habitat & Adaptations
In this lesson we'll be learning about the feared world of scorpions. Although many people are cautious with these venomous animals, many are harmless to humans. Today we're going to learn about the places they live and what adaptations they need to survive.
24. Thelyphonida: Facts, Etymology & Habitat
The class Arachnida is home to many interesting creatures, one of which is the whip scorpion or vinegaroon. This lesson takes a closer look at the whip scorpions; where they live, what they look like, and how they got such interesting names.
25. Dust Mites: Size, Life Cycle & Facts
Do you or someone you know have dust allergies? Did you know that it might be a reaction to dust mites and not the actual dust? Dust mites are closer to us than we realize. Would you like to learn more?
26. Spider Mites: Life Cycle & Predators
If you are curious about spider mites, look no further. In this lesson, we take a close up look at the life cycle and predators of the spider mite. Read on to learn more.
27. Sand Flea Bites: Symptoms & Treatment
Sand fleas can be pesky creatures causing bites primarily on the ankles and lower legs. Read this lesson to learn more about sand fleas, symptoms of their bites, and how to treat them.
28. Eyelash Mites: Physical Characteristics & Facts
Creepy critters crawling on your eyelids? This lesson will explore eyelash mites, describing what these animals are as well as some interesting (and disturbing) facts!
29. Oak Mites: Bites & Treatment
Oak mites are microscopic bugs found on the leaves of oak trees. Occasionally these mites fall from trees and land on human skin. Read this lesson to learn more about oak mites and how to treat their itchy bites.
30. Varroa Mite: Life Cycle & Reproduction
If you are interested in parasites, or even just in bees or bee-keeping, check out this lesson. We will cover the life cycle and reproduction habits of one of the honey bee's most serious enemies.
31. Tarantulas: Anatomy, Habitat & Bite
Many people are scared of tarantulas. In fact, the fear of spiders is the most common fear world-wide. Read this lesson to learn more about the tarantula, maybe you'll see that they're not so scary after all.
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