MICROANATOMY

Detailed explanation-1: -Definition: The moist layer of tissue lining the digestive, respiratory, urinary and reproductive tracts-all the body cavities with openings to the outside world except the ears.

Detailed explanation-2: -The respiratory tract, gastrointestinal tract, and urinary tract all have epithelial linings. Any glandular, exocrine secretion must pass through an epithelial-lined duct. Epithelia form a mechanical barrier on surfaces exposed to the external environment.

Detailed explanation-3: -Two main categories of body membranes are epithelial and connective tissue membranes. Sub-categories include mucous membranes, serous membranes, synovial membranes, and meninges.