Gross structure of the kidney Kidney is a bean shaped organ which is held in position by a mass of fat and both are surrounded by a fi brous connective tissue. In the longitudinal section of the kidney three areas of tissues can be seen to the naked eye. They are outer fi brous capsule, renal cortex and inner renal medulla. Cortex and medulla are supplied with blood vessels and tightly packed with excretory tubules. Renal Cortex is granulated due to the presence of glomeruli. Medulla is...