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This Why Do Humans Have a Third Eyelid? instructional video also includes:
That little pink bud in the inside corner of your eye is actually a vestigial eyelid! Find out more about the plica semilunaris, in a short video that explains why vestigial structures hang around.
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Concepts
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Instructional Ideas
- Have groups investigate other vestigial structures in the human body
- Chart the number of class members who have the palmaris longus muscle
Classroom Considerations
- In addition to the video, a comprehension check, links to related articles, and a discussion forum are provided
Pros
- The "Dig deeper" section includes articles about whales, the African rock python, and other topics sure to engage learners
Cons
- None