Human body systems work together to deliver oxygen and nutrients to cells and remove the wastes those cells produce. This Grade 7 Science worksheet explores transport, exchange and waste removal through the connected functions of the digestive, respiratory, circulatory and urinary systems. Students trace how materials move between systems and explain why these processes depend on one another.

Follow the path of useful materials and wastes

The reading passage connects the movement of nutrients and oxygen with the body's waste-removal processes. Students examine how digestion makes nutrients available for absorption into the blood, how oxygen enters the bloodstream in the lungs, and how the circulatory system carries both materials to body cells. They then follow carbon dioxide from cells toward the lungs, where it moves into the air and leaves during exhalation.

The lesson also explains the kidneys' role in filtering blood and removing excess water and dissolved wastes to form urine. Students connect this process to the bladder, which stores urine before it leaves the body. These pathways help learners distinguish the functions of individual systems while recognising how the systems cooperate to maintain suitable conditions for cells.

Scientific reading and written practice

After reading, students answer multiple-choice questions, evaluate true-or-false statements, write concise explanations, match related information and complete a cloze passage using key vocabulary. An extended-response task asks them to explain how all four systems work together, tracing at least one useful material and one waste material through the connected pathways. A Did You Know feature adds a further point of interest to the lesson.

These activities reinforce terms and relationships such as blood transport, oxygen exchange, nutrient delivery, carbon dioxide removal, kidney filtration and urine formation. Students practise recalling facts, following a sequence, explaining cause-and-connection relationships, and communicating scientific ideas in writing.

What is included

• Student worksheet: Reading passage and structured practice focused on transport, exchange and waste removal.
• Separate answer key PDF: Supports checking student responses and reviewing understanding.
• Student Notes & Lesson Summary: A supplementary resource for consolidating the main concepts and system connections.
• Separate Teacher Guide PDF: Includes Learning Objectives, Teaching Tips, Discussion Questions and Common Mistakes for lesson preparation and classroom support.

Practical use in a Grade 7 Science lesson

Introduce the reading before students investigate how materials move through the body, assign the questions for independent practice, or use the resource to revisit human body systems during unit review. Short written responses can help reveal whether students can explain system relationships, while the extended response gives them a chance to connect the full pathway from useful material delivery to waste removal.

Designed for the Grade 7 Texas Science 7 lesson context, this TEKS-focused resource brings the digestive, respiratory, circulatory and urinary systems into one connected study. The separate answer key, student supplement and teacher guide provide distinct supports for practice, review and instruction.