Urinary System

3. A coiled tube that reabsorbs most of the filtered substances (8,10,6).
6. A coiled tube that regulates water and electrolyte balance (6,10,6).
7. The tip of a renal pyramid that opens into a calyx (7).
10. The smooth muscle that contracts to expel urine (8,6).
11. The outer layer of the kidney, containing nephrons (6).
13. The artery that supplies blood to the kidney (5,6).
17. A cup-shaped structure that surrounds the glomerulus (7,7).
19. A smooth muscle sphincter that controls the flow of urine (8,8,9).
22. A gland that sits atop the kidney and produces hormones (7,5).
23. A skeletal muscle sphincter that allows voluntary control of urination (8,8,9).

1. A muscular sac like organ that stores urine (7,7).
2. The inner layer of the kidney, divided into pyramids (7).
4. A tube that carries urine from the urinary bladder to the outside of the body (7).
5. A funnel-shaped structure that collects urine from the calyces (6).
8. Main organ of the urinary system (6)
9. A tube that carries urine from the distal convoluted tubules to the renal pelvis (10,4).
12. A triangular area at the base of the bladder formed by the openings of the ureters and urethra (7).
14. The vein that carries blood away from the kidney (5,5).
15. A U-shaped loop that descends into the medulla and then ascends back to the cortex (4,2,5).
16. Functional unit of the kidney (7).
18. A network of capillaries within Bowman's capsule (10).
20. Triangular-shaped structures in the medulla that contain collecting ducts (7).
21. A tube that carries urine from the renal pelvis to the urinary bladder (6).