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Exploring Nature Science Education Resource:

Life Science, Earth Science, and Physical Science Resources for K-12

Alveoli, Alveoli ducts, Respiratory Bronchioles (Respiratory Zone)

Alveoli, Alveoli ducts, Respiratory Bronchioles (Respiratory Zone)


True respiration begins in the smallest bronchioles (respiratory bronchioles). They branch into alveolar ducts and finally into the tiny alveoli. They look like tiny bunches of grapes. This is where gas exchange happens. The capillaries carrying oxygen lie right up against the alveoli and form the respiratory membrane. Across this membrane the oxygen is traded for carbon dioxide. Respiration has occurred.



Assess Respiratory System comprehension with the Mutiple Choice Test.

Study the Respiratory System Diagram, then test your knowledge with the Respiratory System Labeling.

Organs of the Respiratory System

Recommended Books and Products

Everything Kids HUMAN BODY BOOK
Learn about the body's systems: digestive, circulatory, respiratory, skeletal, muscular, nervous, endocrine, reproductive and your protective integument (your skin!) This book breaks down the human body and explains its parts and how it works in language a middle school student can understand -- or anyone who is interested in how our amazing bodies work. Also learn fun facts about the body, important vocabulary, interesting exercises and health tips and even do more than 30 body puzzles. Have fun on this 160-page anatomy adventure!

Anatomy book

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