Explain the process of tubular secretion. Where does it take places and what substances are secreted?   subject - kidneys

What glands sit on top of the kidneys? What tissue is found in the renal capsule What is the function of the renal capsule? What are the 3 regions that make up a kidney?

Which of the following pathways best describe the structures which urine has to flow through before being excreted out of the body? (Hint: some structures may be omitted, so just make sure the general order is correct)    1-Collecting duct -> bladder -> ureter 2-Collecting duct -> ureter -> bladder -> urethra 3-Collecting duct -> urethra -> bladder -> ureter   4-Major calyx -> minor calyx -> renal pelvis -> urethra

Explain working of kidneys.