Label the Respiratory System - Free Printable

Task: Label the parts of the respiratory system in the provided diagram and use a different color for each area.

#### Step-by-Step Solution:

1. Identify Each Part of the Respiratory System:
- The diagram shows various components of the respiratory system, and we need to match them with the given labels:
- LUNGS
- NOSE
- MOUTH
- DIAPHRAGM
- LARYNX
- PHARYNX
- TRACHEA
- BRONCHI
- BRONCHIOLES
- ALVEOLI

2. Match the Numbers in the Diagram with the Correct Labels:
- 1: NOSE
- 2: MOUTH
- 3: PHARYNX
- 4: LARYNX
- 5: TRACHEA
- 6: DIAPHRAGM
- 7: NOSE (part of the upper respiratory tract)
- 8: BRONCHI
- 9: LUNGS
- 10: BRONCHIOLES
- 11: ALVEOLI

3. Label the Diagram:
- Assign each part its correct label based on the matching above.
- Use a different color for each labeled part to make the diagram visually distinct.

4. Final Labeled Diagram:
- 1: NOSE (Color: Blue)
- 2: MOUTH (Color: Red)
- 3: PHARYNX (Color: Green)
- 4: LARYNX (Color: Yellow)
- 5: TRACHEA (Color: Orange)
- 6: DIAPHRAGM (Color: Purple)
- 7: NOSE (part of the upper respiratory tract) (Color: Blue)
- 8: BRONCHI (Color: Pink)
- 9: LUNGS (Color: Teal)
- 10: BRONCHIOLES (Color: Brown)
- 11: ALVEOLI (Color: Gray)

Explanation of Each Part:

1. NOSE (1 and 7):
- The nose is the primary entry point for air into the respiratory system. It warms, filters, and humidifies the air before it enters the lungs.

2. MOUTH (2):
- The mouth is an alternative entry point for air, especially during heavy breathing or when the nose is blocked.

3. PHARYNX (3):
- The pharynx is a muscular tube that connects the nasal cavity and oral cavity to the larynx. It is involved in both breathing and swallowing.

4. LARYNX (4):
- The larynx, also known as the voice box, contains the vocal cords and helps produce sound. It also protects the trachea from food and liquid.

5. TRACHEA (5):
- The trachea, or windpipe, is a tube that carries air between the larynx and the bronchi. It is reinforced by C-shaped cartilage rings to keep it open.

6. DIAPHRAGM (6):
- The diaphragm is a dome-shaped muscle located at the base of the chest. It contracts and relaxes to facilitate breathing by changing the pressure in the thoracic cavity.

7. BRONCHI (8):
- The bronchi are the two main branches of the trachea that enter the lungs. They further divide into smaller bronchioles.

8. LUNGS (9):
- The lungs are the primary organs of respiration. They are responsible for gas exchange (oxygen in, carbon dioxide out).

9. BRONCHIOLES (10):
- Bronchioles are the smaller branches of the bronchi. They further divide into even smaller structures called alveoli.

10. ALVEOLI (11):
- Alveoli are tiny air sacs in the lungs where gas exchange occurs. Oxygen diffuses into the bloodstream, and carbon dioxide diffuses out.

Final Answer:

\[
\boxed{
\begin{aligned}
1 & : \text{NOSE} \\
2 & : \text{MOUTH} \\
3 & : \text{PHARYNX} \\
4 & : \text{LARYNX} \\
5 & : \text{TRACHEA} \\
6 & : \text{DIAPHRAGM} \\
7 & : \text{NOSE} \\
8 & : \text{BRONCHI} \\
9 & : \text{LUNGS} \\
10 & : \text{BRONCHIOLES} \\
11 & : \text{ALVEOLI}
\end{aligned}
}
\]

Each part should be colored distinctly as per the instructions.