1. What structures make up the gas exchange system in humans?
In Biology we learn about the structures (parts) of a living thing and their function (what they do).
Alveoli: Where oxygen moves into the blood.
Bronchi: Two tubes that move air into each lung.
Bronchioles: Small tubes throughout the lungs.
Cartilage rings: Hold open the trachea to let air move through easily.
Diaphragm: Muscle under the lungs that moves up and down.
Intercostal muscles: Muscles between the ribs that help with breathing.
Larynx: Structure in the neck that holds the vocal cords.
Ribs: Made of bone to protect the lungs from impact.
Trachea: The tube that brings air into the bronchi.