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Printable science worksheet for early elementary students with reading comprehension questions about the excretory system and how kidneys filter blood.
Worksheet

Excretory System

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This printable science worksheet introduces students in Grades 1–3 to the excretory system with five reading-comprehension and vocabulary questions. Students identify the central idea of the system, supporting details about kidneys, the purpose of captions and illustrations, and vocabulary tools like a glossary. Suitable for introducing basic human body functions and text-feature comprehension.

Subject:
Science
Topic:
Anatomy
Grade Level:
1st – 3rd Grades
Updated March 2026

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