Body systems worksheet - Free Printable

Let's solve this worksheet step by step. The goal is to categorize each organ listed in the middle of the page into its correct body system: Nervous, Respiratory, Digestive, Skeletal, or Circulatory.

---

🔹 Step 1: Understand Each System

- Nervous System: Controls body functions via nerves and brain/spinal cord.
- Respiratory System: Involved in breathing — air intake and gas exchange.
- Digestive System: Breaks down food and absorbs nutrients.
- Skeletal System: Provides structure and support; bones.
- Circulatory System: Transports blood, oxygen, nutrients — heart, blood vessels.

---

🔹 List of Organs (from the worksheet):

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

---

#### ✔ NERVOUS SYSTEM
- Brain → Controls all body functions.
- Spinal Cord → Part of central nervous system.
- Nerves → Carry signals throughout the body.

> ✔️ Nervous System: Brain, Spinal Cord, Nerves

---

#### ✔ RESPIRATORY SYSTEM
- Lungs → Primary organs for gas exchange.
- Trachea (windpipe) → Air passage.
- Bronchi → Branches from trachea into lungs.
- Larynx → Voice box; part of airway.
- Pharynx → Throat; shared with digestive tract.
- Nasal Cavity → Entry point for air.

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

---

#### ✔ DIGESTIVE SYSTEM
- Mouth → Not listed, but we have:
- 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: Pharynx is also involved in swallowing, but it's shared between respiratory and digestive systems. Since it's listed only once, we'll place it under Respiratory as it's more commonly associated with that system in such diagrams.

---

#### ✔ SKELETAL SYSTEM
- Skull → Protects brain.
- Vertebral Column → Spine.
- Ribs → Protect lungs/heart.
- Femur → Thigh bone.
- Humerus → Upper arm bone.
- Tibia → Shin bone.

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

---

#### ✔ CIRCULATORY SYSTEM
- Heart → Pumps blood.
- Arteries → Carry blood away from heart.
- Veins → Carry blood back to heart.

> ✔️ Circulatory System: Heart, Arteries, Veins

---

🔹 Final Answer:

Now let’s fill in the boxes accordingly:

---

🟦 NERVOUS SYSTEM

1. Brain
2. Spinal Cord
3. Nerves

---

🟦 RESPIRATORY SYSTEM

1. Lungs
2. Trachea
3. Bronchi
4. Larynx
5. Pharynx
6. Nasal Cavity

---

🟦 DIGESTIVE SYSTEM

1. Esophagus
2. Stomach
3. Intestines
4. Liver
5. Pancreas
6. Anus

---

🟦 SKELETAL SYSTEM

1. Skull
2. Vertebral Column
3. Ribs
4. Femur
5. Humerus
6. Tibia

---

🟦 CIRCULATORY SYSTEM

1. Heart
2. Arteries
3. Veins

---

✔ Summary Table:

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

---

💡 Tips:

- Some organs are shared (like pharynx), but here they’re assigned based on primary function.
- Blood vessels (arteries, veins) are circulatory.
- Bones = skeletal.
- Brain/spinal cord/nerves = nervous.
- Airways = respiratory.
- Food processing organs = digestive.

You can now fill these answers into the corresponding boxes on the worksheet! Let me know if you'd like a printable version or image annotation.