Earthworm Dissection Worksheet
A Grade 12 Biology worksheet focusing on the external and internal anatomy of an earthworm through dissection.
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Earthworm Dissection Worksheet
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Carefully follow the instructions for your earthworm dissection. Answer all questions thoroughly and label diagrams accurately.
1. Observe the external features of your earthworm. Identify and describe the function of the clitellum.
2. How can you distinguish the anterior (head) end from the posterior (tail) end of the earthworm externally?
1. Earthworms are segmented animals.
True
False
1. The earthworm's digestive system includes the pharynx, esophagus, crop, , and intestine.
2. The is responsible for grinding food particles.
3. Earthworms have a circulatory system.
1. Which of the following organs is primarily involved in reproduction in earthworms?
Gizzard
Seminal vesicles
Nephridia
Dorsal blood vessel
1. Based on your observations, explain how the earthworm's body plan (segmentation, coelom) contributes to its movement and burrowing capabilities.
2. Discuss the importance of the typhlosole in the earthworm's digestive system.