Hygiene Atlas

Atlas · Plate III · Histology and Embryology · 01

Cells and tissues

The body is built from four basic tissues: epithelial, connective, muscle and nervous. Keratinized oral epithelium has basal, prickle, granular and keratin layers, while parakeratinized epithelium, common on attached gingiva, keeps nuclei at the surface. Desmosomes join cells to each other, hemidesmosomes join them to a basal lamina, and fibroblasts are the main cells of the PDL and gingival connective tissue.

High-yield facts · 5

  1. Four basic tissues: epithelial, connective, muscle, nervous.S49
  2. Keratinized epithelium layers from deep to surface: basal, prickle (spinous), granular, keratin (cornified).S52
  3. Parakeratinized epithelium keeps nuclei in the surface layer; it is common on attached gingiva.S52
  4. Hemidesmosomes attach cells to a basal lamina; desmosomes attach cells to each other.S52
  5. Fibroblasts are the most common cells in the PDL and gingival connective tissue.S40

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