These are found in the upper respiratory system and in the lining of the trachea. The epithelium contains goblet cells that produce mucins. Mucins are the component of a mucus that protects the airways. They protect the airways by trapping unwanted material in mucus coated cilia that are swallowed or expelled.
No because they do not all look exactly the same
The answer is false. The particles in the object are going to vibrate faster the hotter it gets.
each plant needs a certain amount of room for their roots and leaves to maximise growth.
