Final answer:
Spittle is a term that refers to saliva, a digestive fluid produced in the mouth by the salivary glands, and is distinct from other bodily fluids such as mucus, pleural fluid, sebum, and tears.
Step-by-step explanation:
The term spittle refers to saliva, which is a clear liquid secreted by the salivary glands in the mouth. Saliva plays a crucial role in the digestive process, beginning with the chemical breakdown of food, and it also serves as a lubricant for speech and swallowing.
It falls under the category of bodily fluids and is different from other fluids such as sweat, tears, or blood. The human body produces several types of fluids for different purposes, including mucus which can be found in the nose and throat, pleural fluid in the chest cavity, sebum which is the oil on the skin, and tears which help lubricate the eyes.