Horseshoe Crabs Are Living Fossils - Enrichment - Ecology
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CA334
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The horseshoe crabs' fossil record extends back 445 million years. They are called “living fossils” because their body structure has changed very little in that time. Help students understand more about this facinating creature with this learning activity.
The exercise covers information about horseshoe crab anatomy and body systems, with specific focus on the animal's efficient immune system. The fifty-plus-year practice of horseshoe crab blood use in medical testing is discussed. The resultant environmental concerns related to overharvesting and the biological impacts on other marine animals provides excellent connections to topics in Ecology.
This activity includes:
- Two-page article about Horseshoe Crab anatomy, body systems, use in medicine, conservation
- Color Coding with four diagramatic views
- Six open-response questions
- Answer Key