Across
- 4. Multiple layers with flattened cells at the surface — common where abrasion occurs (e.g., skin).
- 10. Epithelial function — detecting stimuli such as touch, pressure, or chemical signals.
- 11. Tissue type that supports, binds, and protects (contains cells embedded in an extracellular matrix).
- 12. Single layer of tall, rectangular cells; common lining in stomach and intestine.
- 19. The free or ‘top’ surface of an epithelial cell (often has microvilli/cilia).
- 21. A sealing junction between epithelial cells that prevents passage between cells.
- 22. Glands that secrete hormones directly into the bloodstream (no ducts).
- 23. Small, finger-like membrane protrusions that increase surface area for absorption (e.g., intestine).
- 26. Epithelial function — keeps out pathogens and mechanical damage.
- 27. Epithelial function — movement of molecules from a lumen into cells (e.g., gut).
- 28. Farther from the surface of the body; the bones are \_\_\_ to the muscles.
- 29. Strong anchoring junctions that connect intermediate filaments between neighboring cells (resist mechanical stress).
- 31. Composite structure (two words) composed of basal lamina + reticular lamina — anchors epithelium to connective tissue.
- 32. Tissue specialized for contraction and force generation.
- 33. Closer to the midline of the body; the big toe is \_\_\_ to the little toe.
- 34. Hair-like projections that move mucus and trapped particles (found in trachea).
- 35. Non-cellular material produced by cells of connective tissue; provides structural support and biochemical cues to cells.
- 36. Glands that secrete via ducts onto epithelial surfaces (e.g., sweat, saliva).
- 37. Stratified squamous epithelium without a layer of surface keratin — found on moist surfaces like oral mucosa.
Down
- 1. Appears layered because nuclei are at different levels, but every cell touches the basal lamina; often ciliated in the respiratory tract.
- 2. Single layer of flat cells adapted for diffusion and filtration (e.g., alveoli).
- 3. Closer to the surface of the body; the skin is \_\_\_ to the muscles.
- 5. Tough structural protein that accumulates in the superficial epidermis and helps prevent water loss.
- 6. Specialized epithelium that stretches (found in urinary bladder).
- 7. The lower, attached surface of an epithelial cell that faces connective tissue.
- 8. Away from the midline; the ears are \_\_\_ to the nose.
- 9. Mucus-secreting epithelial cell, abundant in respiratory and intestinal epithelium.
- 13. Toward the back of the body (synonymous with dorsal).
- 14. Toward the front of the body (synonymous with ventral).
- 15. Channel-forming junctions that allow ions and small molecules to pass directly between adjacent cells.
- 16. Tissue specialized for rapid communication and control (neurons & glia).
- 17. One of the four primary tissue types that covers surfaces and forms glands.
- 18. Farther from the point of attachment of a limb to the trunk; the fingers are \_\_\_ to the wrist.
- 20. Stratified squamous epithelium whose surface cells are dead and full of a tough protein — found in epidermis.
- 24. Single layer of cube-shaped cells, often in kidney tubules.
- 25. Thin adhesive sheet of the basement membrane that anchors epithelium to connective tissue.
- 26. Nearer to the point of attachment of a limb to the trunk; the elbow is \_\_\_ to the wrist.
- 30. Epithelial function — production and release of substances (via glands).