1Multiple Choice
Circle the body system that helps move oxygen into your body: nervous, respiratory, or digestive.
2Matching
Match the system to its main job: 1. Skeletal system 2. Digestive system 3. Circulatory system A. Breaks down food B. Supports the body C. Moves blood
3Fill in the Blank
Write one word to complete the sentence: The ________ system helps you think, feel, and respond to things around you.
4True/False
True or False: The digestive system removes waste from the blood.
5Multiple Choice
Which body part is part of the circulatory system? A. Heart B. Lungs C. Stomach
6Short Answer
A student drinks water after running at recess. Which body need is the water helping most?
7Sequencing
Put these steps of digestion in the correct order: A. Food is broken down in the stomach B. Food enters the mouth C. Nutrients move into the blood
8Multiple Choice
Choose the best answer: Why do we breathe faster after exercise? A. To get more oxygen B. To make bones longer C. To digest food quicker
9Short Answer
Name the body system that works with muscles to help you move.
10Short Answer
A person touches a hot pan and quickly pulls their hand away. Which system helped make that quick response?
11Multiple Choice
Which statement best describes the circulatory system? A. It makes sounds when you sleep. B. It carries blood, oxygen, and nutrients around the body. C. It breaks food into tiny pieces.
12Fill in the Blank
Fill in the blank: The system that helps your body remove some wastes in urine is the ________ system.
13Short Answer
Think about clean air. Why is clean air important for the human body? Write one simple sentence.
14Multiple Choice
Which two systems work together most directly when you eat lunch and then use that energy in class? A. Digestive and circulatory B. Skeletal and skin C. Nervous and respiratory
15Short Answer
Real-world challenge: A student feels weak during a hot day outside. Name one body need that may be low and one action that could help.
Answer Key
Teacher Notes:
This skill-builder worksheet introduces human body systems through simple earth science connections such as oxygen, water, energy, and environmental health. Suggested classroom use: warm-up, independent practice, small-group review, or quick assessment. Learning objectives: identify major body systems, describe their basic functions, and connect body needs to resources from the environment. Differentiation: support struggling learners with oral read-alouds, word banks, or partner work; challenge advanced learners to explain how multiple body systems work together during exercise or illness. Extension: have students research how clean air, water, and food support body health.
| # | Answer | Explanation |
|---|
| 1 | Respiratory | The respiratory system brings oxygen into the body when you breathe. |
| 2 | 1-B, 2-A, 3-C | Bones support the body, digestion breaks down food, and circulation moves blood. |
| 3 | nervous | The nervous system controls actions, senses, and responses. |
| 4 | False | The digestive system breaks down food; the excretory system helps remove wastes from the body. |
| 5 | Heart | The heart pumps blood through the circulatory system. |
| 6 | It helps the body stay hydrated. | Water replaces fluids lost through sweat and helps body systems work properly. |
| 7 | B, A, C | Food first enters the mouth, then is broken down, and nutrients are absorbed into the blood. |
| 8 | To get more oxygen | Breathing faster brings in extra oxygen for active muscles. |
| 9 | The skeletal system | Muscles pull on bones, and the skeleton gives the body support and shape. |
| 10 | The nervous system | Nerves send signals very quickly so the body can react to danger. |
| 11 | It carries blood, oxygen, and nutrients around the body. | The circulatory system transports materials the body needs. |
| 12 | excretory | The excretory system removes wastes and helps balance water in the body. |
| 13 | Clean air provides oxygen for breathing and helps the body stay healthy. | The body needs oxygen from air to make energy. |
| 14 | Digestive and circulatory | The digestive system breaks down food, and the circulatory system carries nutrients to the body. |
| 15 | Possible answer: The student may need water; drinking water and resting in shade could help. | Heat can cause dehydration, so water and rest help the body recover. |