and All Correct Verified Answers 2025-
2026 Edition.
4 main tissues - Answer epithelial, connective, muscle, nervous
epithelial tissue - Answer Tightly packed tissue that covers the surfaces of the body, inside and
out, Protects and secretes
apical surface - Answer an upper free surface exposed to the body exterior or the cavity of an
internal organ
basal surface - Answer The bottom layer of epithelial tissue that attaches to the basement
membrane
gap junctions - Answer (communicating junctions) provide cytoplasmic channels between
adjacent cells
tight junctions - Answer (prevents communication) prevent leakage of extracellular fluid across
a layer of epithelial cells.
Desmosomes - Answer (anchoring junctions) fasten cells together into strong sheets (broken
desmosome creates blisters)
basement membrane - Answer Layer between epithelium and underlying connective tissue
Squamous - Answer thin, simple cells (easy diffusion)
Cuboidal - Answer cube shaped (secretion)
Columnar - Answer column shaped, thick (protection)
Cytology - Answer study of cells