Specimen Image
- Kidneys:
- Renal capsule: A tough, fibrous membrane that surrounds the kidney and provides some protection.
- Renal cortex: The outer region of the kidney where most of the filtering of blood occurs.
- Renal medulla: The inner region of the kidney that contains the renal pyramids and the renal papilla.
- Renal pyramids: Triangular-shaped areas in the renal medulla that contain the nephrons, the functional units of the kidney.
- Renal papilla: The tip of a renal pyramid, which drains urine into the renal pelvis.
- Renal pelvis: A funnel-shaped structure that collects urine from the pyramids and connects to the ureter.
- Ureters:
- Renal pelvis: The ureters originate from the renal pelvis of each kidney.
- Muscular layer: The walls of the ureters contain smooth muscle fibers that contract to propel urine towards the bladder.
- Ureterovesical junction: The point where the ureters enter the bladder.
- Urinary bladder:
- Trigone: A triangular area in the base of the bladder that is formed by the openings of the two ureters and the urethra.
- Detrusor muscle: The smooth muscle layer of the bladder wall that contracts to expel urine.
- Internal urethral sphincter: A ring of smooth muscle fibers that surrounds the opening of the urethra into the bladder.
- External urethral sphincter: A ring of skeletal muscle fibers that surrounds the urethra as it passes through the pelvic floor.
Rack Number
Specimen Number
9