L4 - Lung Structure

objectives

• Describe role of the respiratory system in providing O₂ and removing CO₂
• Describe the movement of the ribs and diaphragm during breathing
• Identify the larynx, trachea, bronchi, bronchioles, alveoli and associated capillaries.

Breathing and Respiration

Breathing: The movement of gases in and out of the lungs. Muscles are involved. Also known as ventilation. Breathing in is inhalation and breathing out is exhalation.

Respiration: Breakdown of nutrient molecules to release energy. Takes place in all living cells.

LINK: Organisms breathe to obtain oxygen so their cells can aerobically respire (and to excrete the toxic product of aerobic respiration; carbon dioxide).

Lung Structure Diagram

Functions of each part of the Lungs