bronchioles.
eee
the upper respiratory track
The earthworm has no special respiratory organs. Gaseous exchange occurs through moist skin by diifusion.
The RS, or respiratory system, is kept moist primarily through the secretion of mucus by goblet cells and mucous glands lining the airways. This mucus traps dust, pathogens, and other particles, helping to maintain a moist environment that is essential for effective gas exchange. Additionally, the moisture in the air we breathe contributes to the hydration of the respiratory surfaces. Keeping the airways moist is crucial for maintaining healthy respiratory function and preventing irritation.
thin and moist, with a large surface area and a large concentration gradient.
Endocrine glands
Spiracle, or a respiratory tube
look it up in your biology book! a respiratory organ for the exchange of gases
Usually it is done by means of lungs.
The epiglottis.
The moist cloth will start to cool