Summary
Arthropods shed their rigid chitin covering to grow in a process called ecdysis.
In depth
The rigid cuticle limits growth, so arthropods moult. Ecdysone triggers the process; the animal is soft and vulnerable afterwards. The exoskeleton protects against water loss and predators but limits size.
The cuticle has layers: epicuticle with wax, procuticle with chitin and protein. Hardening (sclerotisation) follows moulting. Growth occurs in steps.
Example: soft-shell crabs are just after moulting.
Frequently asked questions
What is Exoskeleton and Moulting?
Arthropods shed their rigid chitin covering to grow in a process called ecdysis.
Which area of biology covers Exoskeleton and Moulting, and how advanced is it?
Exoskeleton and Moulting is one of the 53 topics in Zoology & Animal Diversity. It is rated Intermediate, so it suits learners who already know the core vocabulary. Related topics in this area include Arthropods, Animal Skeletons, Animal Excretion.
Can you give an example of Exoskeleton and Moulting?
Crabs hide after moulting.
What should I learn before Exoskeleton and Moulting?
Work through the Beginner topics in Zoology & Animal Diversity first, such as Animal Kingdom, Vertebrates and Invertebrates, Sponges, then return to Exoskeleton and Moulting. Intermediate topics assume the Beginner vocabulary.
What topics are related to Exoskeleton and Moulting?
The closest topics to Exoskeleton and Moulting are Arthropods, Animal Skeletons, Animal Excretion, Animal Locomotion. Comparing them side by side is a good way to see how the ideas connect.
How can I check that I understand Exoskeleton and Moulting?
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Exoskeleton and Moulting. To practise the whole of Zoology & Animal Diversity, use the Zoology & Animal Diversity quiz.
How is Exoskeleton and Moulting different from Arthropods?
Exoskeleton and Moulting: Arthropods shed their rigid chitin covering to grow in a process called ecdysis. Arthropods: Animals with jointed legs, exoskeleton and segmented bodies, the largest animal phylum. Read both side by side and note what each one explains.
How should I study Exoskeleton and Moulting step by step?
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Arthropods and explain the difference aloud. Finally, take the Zoology & Animal Diversity quiz and come back to this page for any question you miss.