6. __________ is the study of tissues. 7. __________ is the major tissue type that protects, absorbs & secretes.

Answer

6. Histology: Histology is the branch of biology that studies the microscopic structure of tissues. The word comes from the Greek words 'histos,' meaning tissue or web, and 'logia,' meaning study or knowledge. 7. Epithelial tissue: Epithelial tissue (or epithelium) consists of sheets of cells that cover external body surfaces, line internal organs and cavities, and form glands. Its primary functions are providing a barrier for protection, facilitating the absorption of nutrients (as seen in the digestive tract), and secreting substances like hormones, enzymes, and mucus.