1. Pigments
1.1. Endogenous
1.1.1. Hemoglobin
1.1.1.1. RBCs
1.1.2. hemosiderin
1.1.2.1. brownish granules in phagocytic cells in Liver
1.1.2.2. spleen following phagocytosis of spleen following phagocytosis of old RBCs
1.1.3. Melanin
1.1.3.1. Brown to Black granules
1.1.4. Lipofuscin
1.1.4.1. Yellow brown pidment in long life cells
1.2. Exogenous
1.2.1. Tattooing
1.2.2. Dust & Smoke
1.2.2.1. in lung of:-
1.2.2.1.1. Smokers
2. Stored Food
2.1. Glycogen
2.1.1. CHO
2.1.1.1. EM
2.1.1.1.1. dense granules
2.1.1.1.2. Liver cells (hepatocytes)
2.1.1.2. LM
2.1.1.2.1. H&E
2.1.1.2.2. Periodic acid schiff
2.1.1.2.3. Best's carmine
2.1.1.3. In Liver & Muscles
2.1.1.4. Source of energy
2.2. Lipids
2.2.1. Source of energy
2.2.2. Synthesis of membrane & steroids
2.2.3. stored in adipocytes
2.2.4. LM
2.2.4.1. H&E
2.2.4.1.1. not visualized
2.2.4.2. Osmium tetroxide
2.2.4.2.1. Black
2.2.5. EM
2.2.5.1. Grey (non-membrane) small droplets or large globules
2.3. Protein
2.3.1. in Protein synthesizing cells
2.3.1.1. Salivary Glands
2.3.1.1.1. pancreas
2.3.2. LM
2.3.2.1. eosinophilic zymogen granules
2.3.3. EM
2.3.3.1. secretory granules