Epithelial tissue is always attached to which other major tissue type?

Connective tissue.

The connective tissue usually forms a structural scaffolding for epithelium tissue to attach to. Connective tissue also contains the blood vessels that supply the epithelium with oxygen and remove wase products such as CO2.

lysosomes contain a variety of enzymes, enabling the cell to break down various biomolecules it engulfs, including peptides, nucleic acids, carbohydrates, and lipids (lysosomal lipase). the enzymes responsible for this hydrolysis require an acidic environment for optimal activity. hope i !