Kupffer cells are the phagocytic cells present over the lining of 'sinusoids' (spaces between the hepatic cords) in liver. These cells destroy wan-out white and red blood cells and bacteria.Small intestine possess paneth cells and Argentaffin cells secreting digestive enzymes. These cells are present on simple tubular pits of intestinal glands known as 'crypts of Lieberkuhn'.Pancreas possess groups of cells, islets of Langerhans which contain four type of cells : Alpha cells ( $32-38 \%)$, Beta cells ( $60-70 \%$ ), Delta and F-cells ( $2 \%-8 \%$ )Thyroid gland possess spherical sacs called thyroid follicles. Wall of follicle is made of two types of cells,Principal cells andParafollicular cells.