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System in the human body worksheet - Free Printable

System in the human body worksheet

Educational worksheet: System in the human body worksheet. Download and print for classroom or home learning activities.

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Let’s go step by step to fill in the table correctly.

We have 6 diagrams of human body systems. We need to name each system, write its main function, and list the main organs involved.

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Diagram 1: Skeleton (bones)
→ This is the Skeletal System.
→ Function: Supports the body, protects internal organs, helps with movement (with muscles), stores minerals.
→ Main organs: Bones, joints, cartilage.

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Diagram 2: Brain and spinal cord (yellow line down back)
→ This is the Nervous System.
→ Function: Controls thoughts, movements, senses, and all body functions. Sends messages between brain and body.
→ Main organs: Brain, spinal cord, nerves.

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Diagram 3: Heart and blood vessels (red and blue lines)
→ This is the Circulatory System (also called Cardiovascular System).
→ Function: Moves blood around the body to deliver oxygen and nutrients, remove waste.
→ Main organs: Heart, blood vessels (arteries, veins), blood.

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Diagram 4: Lungs and airways
→ This is the Respiratory System.
→ Function: Takes in oxygen from air, removes carbon dioxide from body.
→ Main organs: Lungs, trachea (windpipe), bronchi, diaphragm.

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Diagram 5: Stomach, intestines, liver, etc.
→ This is the Digestive System.
→ Function: Breaks down food into nutrients the body can use, removes waste.
→ Main organs: Mouth, esophagus, stomach, small intestine, large intestine, liver, pancreas.

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Diagram 6: Muscles all over body
→ This is the Muscular System.
→ Function: Allows movement, maintains posture, generates heat.
→ Main organs: Skeletal muscles (attached to bones).

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Now let’s put it all together in order:

| Diagram | Body System | Function | Main Organ Involved |
|---------|--------------------|-----------------------------------------------|------------------------------------------|
| 1 | Skeletal | Supports body, protects organs, enables motion | Bones, joints |
| 2 | Nervous | Controls body activities, sends signals | Brain, spinal cord, nerves |
| 3 | Circulatory | Transports blood, oxygen, nutrients, wastes | Heart, blood vessels |
| 4 | Respiratory | Exchanges gases (oxygen in, CO2 out) | Lungs, trachea |
| 5 | Digestive | Breaks down food, absorbs nutrients | Stomach, intestines, liver |
| 6 | Muscular | Enables movement, maintains posture | Skeletal muscles |

Final Answer:
The completed table should be filled as follows:

Row “Body system”:
Skeletal, Nervous, Circulatory, Respiratory, Digestive, Muscular

Row “Function”:
Supports body & protects organs; Controls body & sends signals; Transports blood & nutrients; Exchanges gases; Breaks down food; Enables movement

Row “Main organ involved”:
Bones; Brain & spinal cord; Heart & blood vessels; Lungs; Stomach & intestines; Muscles
Parent Tip: Review the logic above to help your child master the concept of systems of the human body worksheet answers.
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