capiller
viruses are the smallest pathogens
roc is the smallest
the smallest adult is dwarfs.
the smallest is temperate rain forest
insects are the smallest animals
The trachea is the main trunk of the respiratory system. It is the central passageway from which the respiratory tree branches.
enables air to get to the lungs a passageway.
The next smaller branch of the respiratory passageway after the tertiary bronchus is the bronchiole, which further divides into terminal bronchioles, respiratory bronchioles, and ultimately alveolar ducts and sacs where gas exchange occurs.
nasopharynx
the alveoli
the alveoli
nasal cavity
The portion of the pharynx that serves only as a respiratory passageway is the nasopharynx. Located above the soft palate, it connects the nasal cavity to the oropharynx and is involved solely in the passage of air. The nasopharynx contains the adenoids and is not involved in the digestive process.
bronchioles
no
The correct order of structures in the respiratory passageway begins with the nasal cavity, followed by the pharynx, then the larynx, trachea, bronchi, and finally the bronchioles leading to the alveoli. This pathway facilitates the movement of air from the external environment into the lungs, where gas exchange occurs.
No, the circulatory system is the system of blood passageways. Passageways that have to do with breathing are parts of the respiratory system.