A. electrons move around the nucleus of an atom and can be exchanged between atoms
Answer:
Temperature, humidity, and wind speed.
Explanation:
Answer: Goblet cells
There are two main areas in the lungs that secrete mucus. From the trachea to the major bronchi ciliated cells and goblet cells are present in the epithelium cells. The surface of the epithelium cells are coated by a mucus layer of viscos elastic gel which acts as a protective barrier and is mobilized by ciliary movement. Mucins are secreted by goblin cells are a major component of the mucus. Mucus is composed of water carbohydrates proteins and lipids
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