1. Loose Connective Tissue
(LCT)

2. Areolar Tissue
Pink = collagen
Purple = elastin

3. Orecin Stain for Elastin – purple “ribbon candy”

4. Sliver Stain for Reticular Fibers

5. Collagen synthesis and organization

7. PAS stain of epithelial basement membranes (BM)

8. Cells of the LCT
Fibroblasts

9. LM of fibroblasts (arrows)

10. Adipose and Adipocytes

11. Adipocytes (fat cells)

12. Adipose Tissue – fat cells + CT septa (arrows)

13. Adipose Tissue fixed and stained w/ Osmium Tetroxide

14. Defense cells of the LCT
Neutrophils, Plasma cells, Mast cells, and Macrophage

15. LCT – a = pericytes; b = mast cell; c = plasma cells;
d = capillary

16. LCT – M = mast cell; P = plasma cells; F = fibroblasts; Eo = eosinophils, N = neutrophils

17. TEM of a Plasma Cell

18. TEM of a Mast Cell

19. TEM of a Macrophage