Let's solve the worksheet step by step and explain each answer.
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1.1. Answer the questions using the words provided in the box:
Words: *oxygen, involuntary, carbon dioxide*
#### a) What gas does human beings take in when we breathe?
We inhale _________.
✔ Answer: *oxygen*
🔹 Explanation: When we breathe in (inhale), we take in oxygen from the air, which is essential for cellular respiration.
#### b) What gas does human beings eliminate during respiration?
We exhale _________ _________.
✔ Answer: *carbon dioxide*
🔹 Explanation: During respiration, cells produce carbon dioxide as a waste product. This gas is transported to the lungs and exhaled out of the body.
#### c) Is respiration a voluntary or involuntary movement?
It is an _________ movement.
✔ Answer: *involuntary*
🔹 Explanation: Breathing (respiration) happens automatically without conscious control, especially at rest. It is controlled by the brainstem (medulla oblongata), making it an
involuntary process.
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1.2. Name the organs of the respiratory system.
Here’s the labeled diagram with correct answers:
#### Labels:
1)
Nose – The entry point for air into the respiratory system.
2)
Pharynx – Also known as the throat; connects the nasal cavity to the larynx.
3)
Larynx – Commonly called the voice box; located below the pharynx.
4)
Trachea or windpipe – A tube that carries air from the larynx to the bronchi.
5)
Bronchi – Two main branches of the trachea that enter the lungs.
6)
Bronchioles – Smaller branches of the bronchi that lead to the alveoli.
7)
Alveolar sacs or alveoli – Tiny air sacs in the lungs where gas exchange occurs.
a)
Lungs – The large organs where oxygen is absorbed and carbon dioxide is removed.
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✔ Final Answers:
#### 1.1.
a) We inhale
oxygen.
b) We exhale
carbon dioxide.
c) It is an
involuntary movement.
#### 1.2. Labeling the diagram:
1)
Nose
2)
Pharynx
3)
Larynx
4)
Trachea or windpipe
5)
Bronchi
6)
Bronchioles
7)
Alveolar sacs or alveoli
a)
Lungs
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This completes the worksheet! Let me know if you'd like a printable version or a visual explanation.
Parent Tip: Review the logic above to help your child master the concept of respiratory worksheet answers.
