Structure of the lungs
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9 Terms
Label the respiratory system
What is the pathway of air?
Nose → pharynx → larynx → trachea → bronchi → bronchioles → alveoli
What are the 3 functions of the respiratory system?
External respiration
Internal respiration
Cellular respiration
What is external respiration?
The movement of oxygen into the blood stream and carbon dioxide into the lungs.
What is internal respiration?
The release of oxygen to respiring cells for energy production and collection of waste products.
What is cellular respiration?
The metabolic reactions that take place on a cell to obtain energy from fuels such as glucose.
What do the nasal cavity, pharynx, larynx and trachea do?
They all have a mucous membrane and ciliated cells to moisten, warm and filter the air before it enters the lungs.
What does the bronchi do?
It subdivides into smaller bronchioles and ned in alveolar ducts. This is the entrance for air to move into the alveoli.
What are alveoli and what do they do?
Clusters of tiny air sacs covered in a dense network of capillaries which together serve as the external site for gaseous exchange.