The respiratory system worksheet - Free Printable

Task: Solve the problems related to the respiratory system.

#### 1. Write the parts of the respiratory system.

The image shows a diagram of the respiratory system with labeled parts. Here are the parts:

- Top left: Nose
- Top right: Mouth
- Middle left: Trachea (windpipe)
- Middle right: Lungs
- Bottom: Diaphragm (not explicitly shown but part of the system)

So, the completed labels would be:
- Top left: NOSE
- Top right: MOUTH
- Middle left: TRACHEA
- Middle right: LUNGS

#### 2. Complete the text about the process of respiration.

The process of respiration involves the movement of air and gases in and out of the body. Here is the completed text using the provided words:

**First, air enters through our NOSE and MOUTHS.
The air goes down through the TRACHEA and the BRONCHI.
The OXYGEN enters in the LUNGS.
OXYGEN (O2) passes into the BLOOD.
CARBON DIOXIDE (CO2) leaves our body when we BREATHE OUT.**

#### 3. True or False?

Let's evaluate each statement:

1. The respiratory system is made up of oxygen, nose, nostrils, and lungs.
- False: The respiratory system includes organs like the nose, nostrils, trachea, bronchi, and lungs, but "oxygen" is not a part of the system itself. Oxygen is a gas that the respiratory system processes.

2. The respiratory system takes oxygen (O2) and releases carbon dioxide (CO2).
- True: The respiratory system inhales oxygen and exhales carbon dioxide as part of the breathing process.

3. The oxygen passes into the blood.
- True: Oxygen from the lungs diffuses into the bloodstream during gas exchange.

4. Air enters our body through our lungs.
- False: Air enters the body through the nose and mouth, not directly through the lungs.

5. The air goes down through the lungs to the bronchi.
- False: Air travels from the nose/mouth through the trachea and then into the bronchi, which lead to the lungs.

Final Answers:

#### 1. Parts of the respiratory system:
- Top left: NOSE
- Top right: MOUTH
- Middle left: TRACHEA
- Middle right: LUNGS

#### 2. Completed text:
- First, air enters through our NOSE and MOUTHS.
- The air goes down through the TRACHEA and the BRONCHI.
- The OXYGEN enters in the LUNGS.
- OXYGEN (O2) passes into the BLOOD.
- CARBON DIOXIDE (CO2) leaves our body when we BREATHE OUT.

#### 3. True or False:
1. False
2. True
3. True
4. False
5. False

Final Answer Box:

\[
\boxed{
\text{1. NOSE, MOUTH, TRACHEA, LUNGS} \\
\text{2. NOSE, MOUTHS, TRACHEA, BRONCHI, OXYGEN, LUNGS, OXYGEN, BLOOD, CARBON DIOXIDE, BREATHE OUT} \\
\text{3. False, True, True, False, False}
}
\]