Earthworm Dissection Worksheet
A Grade 10 science worksheet covering earthworm external and internal anatomy, ideal for pre-lab or post-lab assessment.
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Earthworm Dissection Worksheet
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Read each question carefully and answer to the best of your ability. Refer to your notes and textbook as needed. For questions requiring diagrams, use the provided space to label or draw.
1. Which of the following is the most anterior segment of an earthworm?
Clitellum
Prostomium
Anus
Setae
2. Observe the image below. What is the function of the structure indicated by the arrow?
Digestion of food
Reproduction (forming a cocoon)
Movement through soil
Excretion of waste
3. The earthworm's digestive system includes the pharynx, esophagus, crop, gizzard, and .
4. The main pumping organs of the earthworm's circulatory system are the five pairs of .
5. Earthworms are hermaphroditic, meaning they possess both male and female reproductive organs, but they still require for successful reproduction.
6. Describe the path of food through the earthworm's digestive system, starting from the mouth.
7. Explain the function of the setae in earthworm locomotion.
8. Earthworms have a closed circulatory system.
True
False
9. The dorsal blood vessel is visible on the ventral side of the earthworm.
True
False
Match each organ with its primary function.
10. Gizzard
a. Stores food temporarily
11. Crop
b. Grinds food particles
12. Nephridia
c. Excretes metabolic waste
13. Seminal receptacles
d. Receives sperm from another earthworm
14. Label the following internal structures on the diagram below:
Pharynx, Esophagus, Crop, Gizzard, Intestine, Aortic Arches, Dorsal Blood Vessel, Ventral Nerve Cord, Seminal Vesicles, Seminal Receptacles
