======Earthworm Dissection======


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**Alternative titles:** Exploring Segmented Worm Anatomy
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====Summary====                   
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====Procedure====  
  *Follow instructions provided in the links below.



====Links==== 
Biology 1101 Lab 1 || Earthworm Dissection - aceconnect: 
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Earthworm Dissection - Biologybyme: 
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📄 Earthworm Dissection - Carolina: [[https://www.carolina.com/teacher-resources/Interactive/earthworm-dissection/tr10714.tr?srsltid=AfmBOop9VCEF0VrylqNaPnL7-9iAkJL6jU56Vt7ay0S0KhJi9N0SJxyV]\\

====Variations====
  * Compare earthworm anatomy with crayfish to study open vs. closed circulatory systems.
  * Use microscopes to examine cross-sections of worm tissue.
  * Trace the path of food through the digestive system using diagrams.



====Safety Precautions====
  * Gloves, goggles, and lab coat required.
  * Use dissecting scissors instead of scalpels for safety.
  * Cut shallowly to avoid damaging internal organs.
  * Dispose of specimens and waste according to lab guidelines.
  * Wash hands and disinfect equipment after use.




====Questions to Consider====
  * What structures help the earthworm move through soil? (Setae provide grip and traction.)
  * How does the earthworm’s circulatory system differ from that of insects? (Earthworms have a closed system with vessels and aortic arches, unlike the open system of insects.)
  * What is the role of the gizzard in digestion? (It grinds food before it enters the intestine.)
  * Why are earthworms considered hermaphrodites? (They possess both male and female reproductive organs.)
  * How do earthworms contribute to soil health? (They aerate the soil and recycle nutrients through digestion and excretion.)