Body systems worksheet - Free Printable

Let's solve this worksheet by placing each organ into its correct body system: Nervous, Respiratory, Digestive, Skeletal, and Circulatory.

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🔹 Step 1: Understand Each System

- Nervous System: Controls body functions via the brain, spinal cord, and nerves.
- Respiratory System: Responsible for breathing — takes in oxygen and removes carbon dioxide.
- Digestive System: Breaks down food and absorbs nutrients.
- Skeletal System: Provides structure and support — bones and cartilage.
- Circulatory System: Transports blood, oxygen, and nutrients via heart, blood vessels.

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🔹 List of Organs Given

We’ll go through each organ and assign it to the correct system.

#### ✔ Nervous System
- Brain – Main control center
- Spinal Cord – Connects brain to rest of body
- Nerves – Carry signals

> ✔️ Nervous System: Brain, Spinal Cord, Nerves

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#### ✔ Respiratory System
- Lungs – Exchange oxygen and CO₂
- Trachea (windpipe) – Air passage
- Bronchi – Branches from trachea into lungs
- Nasal Cavity – Entry point for air
- Pharynx – Throat; common passage for air and food
- Larynx – Voice box; connects pharynx to trachea

> ✔️ Respiratory System: Lungs, Trachea, Bronchi, Nasal Cavity, Pharynx, Larynx

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#### ✔ Digestive System
- Mouth (not listed) → but Esophagus is
- Esophagus – Tube from mouth to stomach
- Stomach – Digests food
- Intestines – Absorb nutrients
- Liver – Produces bile
- Pancreas – Produces digestive enzymes
- Anus – Exit point for waste

> ✔️ Digestive System: Esophagus, Stomach, Intestines, Liver, Pancreas, Anus

Note: The pharynx is shared with respiratory system (but also involved in swallowing), so it's listed under both, but here we'll place it in Respiratory as per standard classification in such worksheets.

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#### ✔ Skeletal System
- Skull – Protects brain
- Vertebral Column (spine) – Supports body
- Ribs – Protect lungs and heart
- Tibia – Shin bone
- Femur – Thigh bone
- Humerus – Upper arm bone

> ✔️ Skeletal System: Skull, Vertebral Column, Ribs, Tibia, Femur, Humerus

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#### ✔ Circulatory System
- Heart – Pumps blood
- Arteries – Carry blood away from heart
- Veins – Carry blood back to heart

> ✔️ Circulatory System: Heart, Arteries, Veins

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🔹 Final Answer: Fill in the Boxes

#### 🧠 Nervous System
1. Brain
2. Spinal Cord
3. Nerves

#### 💨 Respiratory System
1. Lungs
2. Trachea
3. Bronchi
4. Nasal Cavity
5. Pharynx
6. Larynx

#### 🍽️ Digestive System
1. Esophagus
2. Stomach
3. Intestines
4. Liver
5. Pancreas
6. Anus

#### 🦴 Skeletal System
1. Skull
2. Vertebral Column
3. Ribs
4. Tibia
5. Femur
6. Humerus

#### ❤️ Circulatory System
1. Heart
2. Arteries
3. Veins

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✔ Summary Table

| System | Organs |
|--------------------|--------|
| Nervous | Brain, Spinal Cord, Nerves |
| Respiratory | Lungs, Trachea, Bronchi, Nasal Cavity, Pharynx, Larynx |
| Digestive | Esophagus, Stomach, Intestines, Liver, Pancreas, Anus |
| Skeletal | Skull, Vertebral Column, Ribs, Tibia, Femur, Humerus |
| Circulatory | Heart, Arteries, Veins |

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