📐 Human Respiratory System Diagram Class 7

Class 7 · Interactive 3D Science Laboratory

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🔬 Anatomical Part

📝 Function

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About Human Respiratory System Diagram Class 7

The respiratory system's job is to bring oxygen into the body and remove carbon dioxide, a waste product of energy production. Air enters through the nose or mouth, travels down the trachea, and branches into two lungs through increasingly smaller airways called bronchi and bronchioles.

Why It's Important

  • Supplies oxygen every cell needs to produce energy
  • Removes carbon dioxide waste from the blood
  • Works continuously, roughly 20,000 times a day
  • Keeps the blood's oxygen and pH levels balanced

Observation Points

  • Trace the pathway of air from the trachea to the lungs
  • Look for the branching pattern of the bronchi
  • Locate the alveoli at the end of the smallest airways
  • Notice how the lungs expand and contract

Learning Objectives

  • Identify the main organs of the respiratory system
  • Explain how oxygen enters the blood
  • Describe the path air takes into the lungs
  • Understand why alveoli are so small and numerous

Summary

The respiratory system draws oxygen in and pushes carbon dioxide out through a branching network of airways that ends in millions of tiny air sacs, keeping every cell in the body supplied with oxygen.

Main Parts

PartFunction
Nose/MouthEntry point for air
TracheaMain airway to the lungs
BronchiBranch the airway into each lung
BronchiolesSmaller branches leading to alveoli
AlveoliTiny air sacs where gas exchange happens

How It Works

Air is inhaled through the nose or mouth
↓
It travels down the trachea into the lungs
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It branches through bronchi and bronchioles
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Oxygen crosses into the blood at the alveoli
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Carbon dioxide crosses out and is exhaled

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  • Toggle Labels to show or hide the numbered markers, then click any label to read what that part does.
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