Human body systems work together to deliver oxygen and nutrients, transport materials to cells, and remove waste. This Grade 7 science worksheet examines how the digestive, respiratory, circulatory, and urinary systems depend on one another to keep the body functioning. Students trace the movement of substances through the body and explain why no single system can perform every task independently.

Follow the pathways through the body

The reading passage connects each system's main function to the materials the body needs and the wastes it produces. Students explore how the digestive system breaks food into smaller substances that can enter the blood through the small intestine, how oxygen passes from the lungs into the blood, and how the heart and blood vessels transport these materials to body cells.

Waste removal is another key focus. Students follow carbon dioxide from body cells through the blood to the lungs, where it leaves during exhalation. They also examine how the kidneys filter blood to remove wastes and excess water and salts, how urine travels to the bladder, and how it exits through the urethra. These pathways make the connections between organ function and the movement of substances concrete and traceable.

What students practise

The activities ask students to apply system functions and pathways rather than simply recall organ names. They consider what may happen when circulation cannot transport oxygen and nutrients effectively, identify the correct route for absorbed nutrients, and distinguish the role of the urinary system from carbon dioxide removal by the respiratory system.

• Multiple-choice questions on system functions, organs, transport pathways, and waste removal.
• True-or-false statements about system cooperation and the movement of nutrients, oxygen, and wastes.
• Short-answer explanations of how body systems work together, including the path carbon dioxide takes out of the body.
• A labeled diagram, categorization activity, and short-note task for organizing and communicating key ideas.

Files included

• Printable student worksheet: Includes a reading passage, response activities, and student notes lines at the bottom.
• Separate PDF answer key: Provides answers for checking student work.
• Teacher guide inside the answer key PDF: Includes learning objectives, teaching tips, discussion questions, and common mistakes.

Using the resource in a Grade 7 lesson

Use this human body systems worksheet when introducing how organ systems cooperate, reviewing transport and excretion, or checking whether students can explain the movement of substances between organs and cells. The reading passage establishes the pathways before students apply them in questions and diagram-based work. Short-answer responses also give students a chance to explain cause-and-effect relationships, such as why effective circulation is necessary for delivering oxygen and nutrients.

The resource is listed for the Texas Science 7 lesson topic covering energy, body systems, inheritance, and classification, with TEKS named in the supplied framework information. It does not claim a specific TEKS code or alignment. The separate answer key and accompanying teacher guide give teachers a practical reference for reviewing responses, leading discussion, and addressing misunderstandings about the distinct but connected roles of the four systems.