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Once an organism is categorised into a phylum, we can further group them into a class. This becomes more specifies, and the animals in a class have more in common than those in a phylum. In this section, we’ll focus on classes in the phylum Chordata, specifically those that are vertebrates.
WHAT WILL YOU LEARN?
Pause & Think
Which subclass of mammals do you think we belong too? Why do you think that?
Look at the image below. Select all the animals that belong to class Aves.
A class is the next level of grouping after phylum. The organisms here are more closely related then the organisms in a phylum.
Mammalia, Aves, Reptilia, Amphibia and Pisces are all examples of classes in the Chordata phylum.
Each class has a specific set of requirements for the animals to belong to it.
Ectotherms rely on the environment to help regulate their body temperature.
Click the ‘question mark’ to test your knowledge with some questions and activities.